Add additional class names and style to components and error indicators to distinguish different error levels.

Vaadin 8 implementation of #9816. Cherry picked changes and added compatibility package component changes and tests.

Resolves #3139

Also includes some other minor cleanup.

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

Change-Id: Ic9c4944eb90218290545a04ecd7455eb63910012

Change-Id: I145e20226958910c243b9897bb1e9516919f55cd

Adds a v7 AbstractFieldConnector for the compatibility package
Remove dependency from core to old AbstractField

Change-Id: I5da665de69cf469adfa946cf18aae1a3e56c3486

Change-Id: I6485dee1ebba12b180a9063ed4b530f7dc63cd77

Change-Id: I4c852b7f9928e190572876690d5bef1234494a5d

Change-Id: I33f1cc33969ff74a95b1b8cc0f2add589be5aae0

Change-Id: I36c426086a2b957f6f738d17470c499a01ddac3b

The <table> used by the FormLayout doesn't reduce its size if any child
component has locked its own size (which is the case with e.g. Table and
some other components doing explicit pixel calculations). To work around
this, we need to detect the situation, force the <table> to reduce its
width by temporarily assigning explicit widths to the cells and then
remove the forced size after all children have adjusted.

Change-Id: Iacef62979acf24c869a5cbeb82efb0c1e537ec95

Change-Id: I0575556785aa2c5cedb8ec40e2db1ec6644967cc

Change-Id: I8a666061496022ef16ed44812b5728e1360b9c4d

Change-Id: I334441fd2f8d5f6d9e0629f5d7b564e9008f3fe5

Change-Id: I7381a6212b824f9dafc5fe7359b0e791f15c57b2

Change-Id: I45e6a651daf00f1d6868ad27c042891ef0d34f6a

This change is only a brain dead replacement of one specific method. In
some cases, there were some oddities in the surrounding code as well,
but these were left unresolved on purpose.

It should also be noted that DOM.setStyleAttribute just delegates to
element.getStyle().setProperty(), so any null references would have
caused problems already in the existing code.

Change-Id: I340122ac0767af9928076376f76e5bd2c5e19f9f

Change-Id: I63f0b1c8da52d426b5c370097256b08dbd44b5d7

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

This is the first step towards eliminating usage of the class. Reasoning
about upcoming steps will be easier when it's clear which class
"Element" refers to.

Change-Id: Iea5547f789edc77c3b4ac95a5e2eb34d2717999e

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: I307b1fdc3d1d1e338b3964468aaa868f7cd5fdb9

Change-Id: I8daf3f377d4d9f2c2f774781e0c68f550d5c86e0

Implementation of suggestions from usage test by an screen reader user

Change-Id: If02512f3d4ee60e3e115023af9d9e600dc11321a

Field implementations of the WAI-ARIA changes in the base classes

Change-Id: Ie51e76130f3f9976a32c373334b709f0f5b68f1a

Change-Id: I419ce4581d1a8b84d4236a85a1333d23f3423b2e

Change-Id: I14f46e6aa4f9cbdd9037f1c4ad1ac38fe7cbda86

Change-Id: Ida6e0cb7064580be36627fd735d79b82ee69356d

Conflicts:

	client/src/com/vaadin/client/ui/VScrollTable.java

Change-Id: Ie65e26c9e3df520b099744d4bc1aecc901eaa07a

StyleConstants

selector to all layouts

Only layouts actually supporting margins now implement MarginHandler
CssLayout should be simplified before 7.0.0 so margin support was removed. GridLayout, VerticalLayout and HorizontalLayout were the only other layouts which actually supported margin.
MarginInfo is now passed directly in the state.

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.

Added AbstractOrderedLayoutState for spacing info

Visibility change related code for captions removed from VCaption,
VCaptionWrapper and VFormLayout.Caption, should be handled by
removing/adding caption based on hierarchy change events.

The flag should be used directly from shared state, but that requires
error message etc. related updates to be done in a listener before
sending states.

This change removes support for error messages on tabs of a tabsheet or
an accordion. Those should be implemented differently if needed.

This is an intermediate step towards moving error messages from UIDL to
shared state.