TextEditor: Update status bar to use clickable Segments

Adds two new Segments to TextEditor's status bar to quickly
change and display syntax highlighting and line and column info.

Userland/Applications/TextEditor/main.cpp

@@ -88,6 +88,7 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         }
     }
     text_widget->update_title();
+    text_widget->update_statusbar();
 
     return app->exec();
 }