* 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
The static function WikiEditorHooks::editPageShowEditFormInitial is
kept for compatibility because there are usages in other extensions.
Change-Id: I7ba9f56fd3d00d575696f00f9f1c868fa7ad223b
ConfirmEdit should be added as a phan dependency, so thing like this no
longer happen in the future.
Bug: T296287
Change-Id: Ic9942b3a6d872c0d3c0e3a53d9462df6f82b06c6