Update VE core submodule to master (19be0c1)

Also add OO.ui.ConfirmationDialog things and
update Gruntfile.js for breaking changes in VE core.

New changes:
5f1514b Localisation updates from https://translatewiki.net.
0cde22f Localisation updates from https://translatewiki.net.
ca021d8 Fix desktop dialogs
3503287 Localisation updates from https://translatewiki.net.
f02286b build: [BREAKING CHANGE] Add dependency expression
25fc053 Use message function and correct message key
a097202 Create phantom/shield nodes with methods not templates
1399844 Load dependencies in correct order
5a39c9e build: Simplify building of module dependency list
2a3871f build: Upgrade jscs and jshint
7db9b88 Localisation updates from https://translatewiki.net.
d34b2ae Update OOjs UI to v0.1.0-pre (80f1797a5c)

Change-Id: I0f23042e3cadd4614cd1dcd905287af777dd6ed3