ve.ui.MetaDialog.js
* Added scrolling to outline panel
ve.ui.css
* Added reusable animation keyframes
ve.ui.Dialog.css
* Changed dialog head style
* Changed dialog cancel button to close icon button
* Added animation of dialog opening
* Increased min-height of dialog to always show a little content
ve.ui.Icons-*.css
* Added close icon (not sure why it was missing)
ve.ui.Window.css
* Moved head padding out of window and into implementations of window
ve.ui.Dialog.js
* Moved apply button to footer
* Renamed cancel button to close button
* Overrode close method with triggers a closing animation and then calls the parent close method after an animation is complete
* Added classes to close and apply buttons to make styling less ambiguous
* Converted cancel button (now the close button) to an icon button
ve.ui.Window.js
* Added footer to dialog
VisualEditor*.php
* Added close message
Change-Id: Iededbc54b287328b3047b05efad6ca3cc152caa5
