Inline the Toolbar._localized method in the 'localized' event handler

Considering just how small/simple this code is, it doesn't seem necessary to have a separate method for it (even more so when there's only one call-site).

web/toolbar.js

@@ -152,14 +152,10 @@ class Toolbar {
     scaleSelect.oncontextmenu = noContextMenuHandler;
 
     this.eventBus.on('localized', () => {
-      this._localized();
-    });
-  }
-
-  _localized() {
       this._wasLocalized = true;
       this._adjustScaleWidth();
       this._updateUIState(true);
+    });
   }
 
   _updateUIState(resetNumPages = false) {