Chrome 94 screenshot changes

* Update Vaadin7 to use atmosphere-runtime 2.2.13.vaadin2

* Update Constants.java

* Chrome 94 (#12434)

* Added logging for generateArchetype in BuildHelpers

* Chrome 94 screenshot changes and version number

Co-authored-by: Olli Tietäväinen <ollit@vaadin.com>

* Add MPR UI id request parameter

* Update test

* Update test

* deprecate vaadin-snapshot (v7)

* update chrome version and screenshot

* update vaadin-bom

Modified cherry-pick of #12385

* fix: Do not allow border to grow row height

If css grows row height the VSrollTable rowHeight logic does not work allways

Fixes: https://github.com/vaadin/framework/issues/12251

* Compensate change in default row height

* Merge branch '7.7' into fix12251

* Replace calc with round

* Make fix more pin-point

* The first row does not have border thus regular height

* Fix drag-drop styles

* Further fix in drag-and-drop style

* Update TableDropIndicatorValoTest-indicator_ANY_Chrome__indicator.png

* Update Jetty version to 9.4.38.v20210224

* Update tests

- Properly init client-side data in GridDataChangeHandlerTest
- Update Chrome version
- Separate and refactor ComboboxMenuBarAutoopenTest test cases to match
test description
- Update screenshot for ResponsiveStylesTest
- Refactor TextAreaEventPropagationTest to better match expected
behavior
- Add delay to GridDetailsClientTest and EscalatorSpacerTest for
stability
- Add delay and retries to TreeItemDoubleClickTest for stability

Co-authored-by: Teemu Suo-Anttila <teemusa@vaadin.com>

This is the same as #12190, but also applied for the upload security key
and the push id since both of those are also used to protect against
cross-site attacks. In addition, documentation for the push id is
clarified to point out its role.

Backporting of #12189

Cherry pick https://github.com/vaadin/framework/pull/12131

* Change license from Apache-2 to CVDLv4

* Update header for checkstyle

* Add license checker

* Fix reference header

* Fix license header

* Update Chrome version

- Updated Chrome version
- Added leeway to ComboBox popup following along while scrolling
- Added workarounds to timing issues that aren't relevant for the tests
- Added delays for stability

* Updated browsers' screenshots

* Update browsers' screenshots

* Update chrome version to 83

Co-authored-by: Anna Koskinen <Ansku@users.noreply.github.com>

Co-authored-by: Anna Koskinen <Ansku@users.noreply.github.com>

Fixes #11893

* Change ContextMenu position from absolute to fixed

* Use getBoundingClientRect to get the coordinates of columnSelector in
VScrollTable when the context menu is being opened

* Update TableTooManyColumnsTest screenshot

* Upgrade Chrome version in VerifyBrowserVersionTest

* Update ValoThemeUITest-sliders screenshot

This fixes a compilation error with Eclipse Oxygen.

* Fixes #11601. Add toggle for disabling touch detection on table multiselect.

* fix tests

Fixes failed tests

* Correct failing test and add sleep

* Update screenshots

* Fixes a Grid issue that breaks sorting.

When multi-select has been enabled and disabled a number of times, sorting on the first column in a Grid is broken.
Unregistering a click handler on the header solves the problem.

* Added a test checking that sorting of a grid column still works after having enabled and then disabled multi select mode.
The grid is configured with an extra header row containing a text box since it triggers an exception if the header click handler for the multi select column is not removed.

* Remove an unused import that was added by mistake

* Improve VMenuBar click handling logic

Backport to V7:
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 preserving the action from the MenuItem

(cherry picked from commit 22cc85c76f)

* Improve VMenuBar click handling logic

Add missing files from the first commit

Backported to V7:
(cherry picked from commit 22cc85c)

7.7 reference screenshot directory

* Fix #11246

Take zero pageLength into account when calculating filtered ComboBox contents.

* Create ComboboxPageLengthZeroFilterTest.java

* add UI tests for fix

* IE9 screenshots

* wrong screenshots and JRE version

* delay for submenu

* potential fixes for the tests