[BREAKING CHANGE] Update VE core to master (cb2e61b)

Update dialogs and inspectors for breaking change in VE core

New changes:
a553012 [BREAKING CHANGE] Merge dialog and inspector actions into window actions
f9a0419 Localisation updates from https://translatewiki.net.
cbe81a0 Fix path to spinner in ve.ui.SpecialCharacterInspector.css

Change-Id: Icf90ace6442364283b66b234e3c78fc65212f070