Update VE core submodule to master (bc4355a)

New changes:
fe0bc6c Move most of ve.js to ve.utils.js
6be79d9 Remove and restore selection for non-isolated dialogs
2bf123d Localisation updates from https://translatewiki.net.
d2c4d18 Fix missed conversion of inlineMenuWidget to dropdownWidget in demos
bc4355a Localisation updates from https://translatewiki.net.

Local changes:
* ve.utils.js updates

Change-Id: Ibb7d7483b23edcccbd83dc8fadd4407dca380a25