If the query is cleared, we should still clear all items and abort any
loading that may be going on. We should still not try and load results
for an empty query though.
Change-Id: If23c6e0469247b1c1c47ab85b9a5a010e8a4fe26
Objective:
* Allow inserting images from local wiki and commons
Changes:
ve.init.mw.ViewPageTarget.js
* Add media insert button to toolbar
ve.init.mw.Platform.js
* Add getMediaSources method - defaults to local wiki and commons
ve.ui.MWMediaInsertDialog.js
* New dialog for inserting media
* Uses a media select widget and inserts block images
ve.ui.Dialog.css
* Added styling for media select widget in media insert dialog
ve.ui.Widget.css
* Added styles for media select widget and media select item widget
ve.ui.MWMediaInsertButtonTool.js
* New tool for inserting media
ve.ui.MediaSelectItemWidget.js
* New item widget for media select widgets
ve.ui.MediaSelectWidget.js
* New widget for searching for and selecting media items
ve.ui.TextInputWidget.js
* Added isPending method
VisualEditor.i18n.php
* New messages for media insert dialog
VisualEditor.php
* Added links to new files and messages
PhantomJS--
Change-Id: Ia803ff3ef518782ce76802d2dab7559686a1bb0a
