Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  ffff7527dda70aa631bc0817082d2a4c3361c7a2

Implemented wikibase toolbarlabel and toolbarbutton widget

The change set removes some of the legacy JavaScript code by replacing
wikibase.ui.Toolbar.Label and wikibase.ui.Toolbar.Button with
jQuery.wikibase.toolbarlabel and jQuery.wikibase.toolbarbutton. For
consistency, from now on, a button is always represented by an <a> tag
- enabled/disabled state is managed via css styling and JavaScript,
tabbing is suppressed by assigning a negative tabindex attribute.

Change-Id: I8f61a767ae6cfc369bd04dc34d902d0dc2736109