Update VE core submodule to 72788ab0670bdc4343baa75f907b1a689bddecec

New changes:
fd9babf Localisation updates from https://translatewiki.net.
edd0561 Only allow pointer events on shields inside generated content nodes
d475984 Actually hide the size label when not in use
2d04297 Update OOjs UI to v0.1.0-pre (7d3223b8f4)
cca13e0 Update OOjs to v1.0.7-pre (9c04f3e917)
72788ab Localisation updates from https://translatewiki.net.

Change-Id: Ida75926ed2303c410a52141d1c1bb6a99b3e78f7