New changes:
6cae77b ElementLinearData: Add another case to hasContent
d2e15f2 SurfaceFragment: Improve handling of delete all
16db2a3 Return 'null' instead of null in ve.Filibuster observers
24de6b2 Introduce key down handlers to separate logic from ce surface
f77fe99 Localisation updates from https://translatewiki.net.
062cb26 Localisation updates from https://translatewiki.net.
Change-Id: I61c94983c7898af219266af3022761638c7578b7
Some modules had the same name as test modules in VE core,
and this broke expand/collapse behavior in QUnit.
Change-Id: I7fd0b454b3377b7c289ddebbf91146fcbe5945c4