Update VE core submodule to master (1f82a47)

New changes:
5d063a2 Don't use three different coordinate systems in getSelectionRect()
feeb1ae Only focus the paste target if focusedNode has changed
2c1bb97 Update OOjs UI to v0.1.0-pre (4cef83f702)

Local changes:
* Update references to renamed classes
* Update calling patterns element mixins

Change-Id: I330c0e308807597dec31dad8dbf713eb29fdc290