Add tests for ve.dm.Document.getNearestWordBoundary

Also in this commit is a minor fix to the regular expression so it
behaves as documented (the hyphen needed escaping).

Bug: 44085
Change-Id: Idc315e2dce79be8f028b5681c60f74e175b9d869
Correct name of can(Node)HaveGrandchildren functions

Bug: 43893
Change-Id: I9fd2a1fd6e3ee0a7bdfc357b5d4e4e0fd3efa0a5
Fix Surface constructor in IndentationAction tests

The IndentationAction was created against a version of master which
didn't have the new Surface constructor signature. This commit resolves
that conflict.

Change-Id: Ifc17f95acfa6057963d503448405355831b1ff97
Context, frame, window, dialog and inspector refactor

This is a major refactor of user interface context, frame, dialog
and inspector classes, including adding several new classes which
generalize managing inspectors/dialogs (which are now subclasses
of window).

New classes:
* ve.ui.Window.js - base class for inspector and dialog classes
* ve.ui.WindowSet.js - manages mutually exclusive windows, used
  by surface and context for dialogs and inspectors respectively
* ve.ui.DialogFactory - generates dialogs
* ve.ui.IconButtonWidget - used in inspector for buttons in the head

Refactored classes:
* ve.ui.Context - moved inspector management to window set
* ve.ui.Frame - made iframes initialize asynchronously
* ve.ui.Dialog and ve.ui.Inspector - moved initialization to async
  initialize method

Other interesting bits:

ve.ui.*Icons*.css, *.svg, *.png, *.ai
* Merged icon stylesheets so all icons are available inside windows
* Renamed inspector icon to window

ve.ui.*.css
* Reorganized styles so that different windows can include only
  what they need
* Moved things to where they belonged (some things were in strange places)

ve.init.Target.js, ve.init.mw.ViewPageTarget.js, ve.init.sa.Target.js
* Removed dialog management - dialogs are managed by the surface now

ve.ui.*Dialog.js
* Renamed title message static property
* Added registration

ve.ui.*Inspector.js
* Switch to accept surface object rather than context, which conforms
  to the more general window class without losing any functionality
  (in fact, most of the time the surface was what we actually wanted)

ve.ui.MenuWidget.js, ve.ui.MWLinkTargetInputWidget.js
* Using surface overly rather than passing an overlay around
  through constructors

Change-Id: Ifd16a1003ff44c48ee7b2c66928cf9cc858b2564
Merge "Context, frame, window, dialog and inspector refactor"
Merge "Fix Surface constructor in IndentationAction tests"
Merge "Add tests for ve.dm.Document.getNearestWordBoundary"
Merge "Correct name of can(Node)HaveGrandchildren functions"
Add support for non-Latin scripts to wordBoundaryPattern

Replacing [a-zA-Z] with a long unicode expression which encompasses
all the characters in the unicode 'letters' category. Similarly replacing
[0-9] with an expression for 'numbers'.

Bug: 44085
Change-Id: Idd403339caa24769ce08133dda06ab6d4b9d694e
Merge "Add support for non-Latin scripts to wordBoundaryPattern"
Localisation updates from http://translatewiki.net.

Change-Id: I160ebbac817543781de503ae1e5928c18b08e4da
Toolbar actions not floating

Spurious semi-colon caused class to not be parsed, making toolbar actions not float right

Change-Id: I1ef88358908002cd7feb8c02b5da80d4f1ffe46d
Merge branch 'master' of https://github.com/wikimedia/mediawiki-extensions-VisualEditor