Update VE core submodule to master (c5b5c82)

New changes:
f6952f9 Localisation updates from https://translatewiki.net.
4875bc9 Comment onDOMEvent hack
5e91b85 Prevent focussing of the pasteTarget with tabIndex=-1
18288c1 Localisation updates from https://translatewiki.net.
21371ce Move toolbar updateState code into separate method
44a56ac [BREAKING CHANGE] Simplify updateState params
eeb0fd4 Clear the focusedNode when the document is blurred
cbb0b73 Check for focus change on global mousedown
7ed5f92 Only focus the surface on inspector close if range is not null
692b0d5 Localisation updates from https://translatewiki.net.
5a976b0 Localisation updates from https://translatewiki.net.
71a3a41 Add ActionDialog and NodeDialog
b7e791a Update OOjs UI to v0.1.0-pre (b91660e612)
ba1fe44 Localisation updates from https://translatewiki.net.
bf0d4c1 Always fix up selection after ce.Surface#focus
5ec176e Use window 'ready' event
3f729b1 Remove surface blur hack now that windows take focus properly
c921ee9 docs: Remove JSDuck 4 options
c5b5c82 Localisation updates from https://translatewiki.net.

Change-Id: I81f021aa64316cea23f10e0dfbb0f6ffa014c384