Add a 'reload' button to the right-side preview pane (that shows
on hover, and stays in the same place when the preview is
scrolled), and also an accesskey to trigger the preview. If the
preview is not open when the accesskey is pressed, it'll be
opened.
Bug: T303532
Change-Id: Ifa77ad7cf6d2ed6a8b955f9a324986d1c6f9a993
Change from a pseudoelement ::before the left pane, to its own
element. This is so that when we introduce the top manual-reload
bar the blue bouncing loading bar can be shifted down below it.
Also moves the CSS out of TwoPaneLayout.less and into
RealtimePreview.less where it more properly belongs.
Bug: T304568
Change-Id: I540f68d528d92b7db8594d729985e5dad3d90ac1
* Toolbar button to toggle a two-pane layout on and off.
* Resizable bar for the width of the two panes.
* Resizable bar for the edit box height, even when realtime preview is off.
* Only enabled when $wgWikiEditorRealtimePreview = true.
* Fires JS hooks when enabled, resized, and disabled.
Bug: T293347
Change-Id: Id09d44519249c0b7f5c33d48d524b7c92a5a9106
