ve.collab: Resize toolbar properly after adding authorList

Change-Id: I18ebe5a230b775d048d5c5792b455831b9b59968

collab/ve.collab.js

@@ -113,10 +113,12 @@ ve.collab.initPeerClient = function ( serverId, isMain ) {
 					);
 					return;
 				}
-				ve.init.target.getToolbar().setup(
+				var toolbar = ve.init.target.getToolbar();
+				toolbar.setup(
 					ve.init.target.constructor.static.toolbarGroups,
 					ve.init.target.surface
 				);
+				toolbar.onWindowResize();
 				if ( !isMain ) {
 					// eslint-disable-next-line no-jquery/no-global-selector
 					$( '.ve-ui-toolbar-saveButton' ).css( 'text-decoration', 'line-through' );

src/ui/ve.ui.Toolbar.js

@@ -271,6 +271,11 @@ ve.ui.Toolbar.prototype.detach = function () {
 		this.getSurface().getModel().disconnect( this );
 		this.surface = null;
 	}
+	// Reset narrow state/cache as when we setup again it
+	// may be with a different tool list.
+	// TODO: Create upstream detach/teardown
+	this.setNarrow( false );
+	this.narrowThreshold = null;
 };
 
 /**