Use generated IDs for MenuItems when an ID is set for MenuBar. Tying the ID to MenuBar's ID helps with the possible case of having multiple MenuBars on the same view and avoids to have excess id's when not needed.

Fixes: https://github.com/vaadin/framework/issues/8186

* Improve VMenuBar click handling logic

During `updateFromUIDL` inside MenuBarConnector we empty and re-instantiate the components of MenuBar. When we are modifying the Menubar from the BlurEventListener of another component, we ,by this, remove widgets, therefore clickEvent is not fired and the action of the MenuItem is not proceed as a result. (The BlurEvent is fired before the click event in the chain of events. )

To improve the situation, we catch onMouseDown event , which is fired before BlurEvent,by assigning mouseDown flag to true. Then if no click event has yet happened, we delay the execution of update inside `updateFromUIDL` by default 500 ms. Then if click event occurs, it proceeds normally. The time can be increased/decreased using setter.

There is no delay, if we are clicking on the MenuBar as usual or no Blur listener is set.

This change allows setting descriptions

* Remove accidentally committed comment

* Don't update the state on the getDelayMs call

* Accessibility for MenuBar (#3922)
* TabIndex handling fix and an indexing tweak
* Make disabled MenuItems selectable for accessibility (#3922)

- It should be possible to navigate to a disabled MenuItem, even if
triggering the related command is disabled

* Refactor primary style name and aria attribute handling to own method

In some places, getWidget() is called many times, and I believe this can
have a litte performance improvement, since in some cases
super.getWidget() is called more than once.

Also includes some other minor cleanup.

* Fix java packaging order (#106)

Closes vaadin/archetypes#113

* Use proper UTF-8 encoding for Content-Disposition filenames (#19527) (#6607)

* Enable changing the backing bean for BeanItem (#4302) (#77)

When storing a bean to the database, you typically get a new and updated
bean instance back. By allowing to change the bean instance, we make it
possible to just update the single BeanItem instance which can be used
in many places.

* Make AtmospherePushConnection methods public (#7973)

There is no sensible way to use a custom version of APC, so protected
access does not help in any way to access the underlying resource and/or
connected UI.

* Use correct indexes in multiselect checkboxes after removing rows (#8072)

Fixes #8011

* Fix removal of hidden Grid columns (#8071)

Fixes #8018

* Call error handler for exceptions in UI.init() (#8055)

Fixes #4995

* Render font icon correctly on the 'more' menu item (#8126)

* Render font icon correctly on the 'more' menu item

Fixes #8125

* Reopen Grid details on attach, fixes #8015 (#8074)

Fixes #8015

* Fix broken Grid tests after picking changes from 7.7.7

Removed duplicate setDetailsVisible calls from onDetach

* Correctly detach components in merged cells when a static row is removed (#8142)

Fixes #8140

Does not modify compatibility packages to keep to closer to Vaadin 7.7

Change-Id: Ic9c4944eb90218290545a04ecd7455eb63910012

Change-Id: I6485dee1ebba12b180a9063ed4b530f7dc63cd77

Change-Id: I4c852b7f9928e190572876690d5bef1234494a5d

Change-Id: I33f1cc33969ff74a95b1b8cc0f2add589be5aae0

Change-Id: I36c426086a2b957f6f738d17470c499a01ddac3b

* Deprecated old methods in Util for backwards compatibility

Change-Id: I9de5e6b930d9f2c0268967dc7b1cf465e6310280

Change-Id: Ic77338304dc7e58e49f27dcdaf0bab2e00f5bba6

Changed implementations and APIs to use the non-deprecated Element class
wherever possible without breaking backwards compatibility.
* Methods defined in interfaces have not been touched.
* Return types have only been changed methods that should have no
existing third party callers (i.e. private, internal or @since 7.2)
* For methods that third party code might have overridden, the method
has been deprecated in favor of a new method that just delegates to the
old method.
* For methods that can't reasonably be overridden by third party code
(i.e. private, final, static, internal or @since 7.2), the parameter
type has been changed without retaining the old method.

Change-Id: I7da943a77b8d0d0b9185d8c70f87d676a275d24b

Change-Id: I2522698237eb2a21c0896605bed8e73a82795c97

Renamed Icon to ImageIcon

Change-Id: I608815f17a3651b205fed81b5294385df0d68802

Extracted the abstract client-side Icon class

Change-Id: Ic32e270595a5796d0bbd1dd31f34282b56672aa9

Created the FontIcon class

Change-Id: Iad13871e7bf1807dee2c538c76306d4620191f5e

Renamed AbstractComponentConnector.getIcon to getIconUri

Change-Id: I6953ab79661993b561655d483c1bd013b66407f3

Added the AbstractComponentConnector.getIcon method

Change-Id: I6fb91dc643fb09da3ba53666b1a8a289901702e3

Refactored getIcon

Change-Id: Ibae39e66d0fb8449e20ac5209eb8c18b6ada4387

Made all existing uses of Icon compatible with FontIcons

Change-Id: I8f28ec5254f2e5282a887519d3f44bc1e27aba72

Initial server-side support for font icons - does not include an actual icon set yet (#13152)

Change-Id: Ie6c09b17dd577c726e0efc13567749f6f4d56d8d

Changed server side FontIcon URI generation to match the correct scheme

Change-Id: I3628b930b310b3f285bc58a3f471e31e641d307e

Initial server-side icon font (FontAwesome) with scss - to be considered placeholder for testing (#13152)

Change-Id: I361e62aba0d943a736471824e149d65c7eea9c76

Changed the FontIcon URI scheme

Change-Id: I15c92f6bb3d0aa0a800f3f0bfa80419979453e17

Added FontIcon support to AbstractOrderedLayoutConnector

Change-Id: I3b2b45b22d29622fd888dbe922aa0cc8a718104d

Added FontIcon support to table items

Change-Id: Id22ce94c96a892420aab1e39663688fc9f3bc282

Added FontIcon support to OptionGroup items

Change-Id: Ie08bef688f6802182ef5f8b2bf82cf8b1f9096bb

Switched to openly use FontAwesome (#13152)

Change-Id: I18c3325ce93915b7fd6e338c8c293a89711277bc

VaadinIcons are now FontAwesome (#13152)

Change-Id: I0ab2a80735cbf08b6e33d358e3e8c6a205626fc4

VCaption does not longer set icon to 0x0px if it's a FontIcon (#13152)

Change-Id: Ibcd96e0f79f0adf2e217a8580d17f1cc93705710

Fixed typo in @font-face, removed .otf (#13152)

Change-Id: I698ca32c560e5f198c32a6c44f7884d3030ee610

Make font icons behave more like img (display:inline-block) (#13152)

Change-Id: Ic79186c90f1fc566deae1f4d8d4ba2c21d89a42e

Change-Id: I3038b97d9a7c7e144a325ce87aa849309b9b31c4

Default loadStyle is now eager. Only RichTextArea and ColorPicker are set as lazy.

Change-Id: Icc22ea7f861a1435f94ff74426a958c9ca32ba77

Change-Id: I419ce4581d1a8b84d4236a85a1333d23f3423b2e

Change-Id: I5bc64ed7446ca6f87311bf63f49fb883cfd8b538

Change-Id: I8ac3f6eec22cbfd94a6abd6fdbb1d738422c97ae

@Component is not good as the server side does not have to be a Component

Class loaders have problems with referring to static inner classes (e.g.
state classes) when they cannot load the declaring class. To deal with
this the components have been moved to their own packages and state/rpc
classes will be defined in their own Java files.

status) and enable state handling for components on client side
(depend on parent)

mechanism. Changed isDisabled to more logical isEnabled in state.

accordingly