Timeseries: Time regions migration (#66998)

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

public/app/plugins/panel/graph/tab_display.html

@@ -9,7 +9,7 @@
         Migrate
       </button>
     </p>
-    <p>Some features like colored time regions and negative transforms are not supported in the new panel yet.</p>    
+    <p>Some features are not supported in the new panel yet.</p>
   </div>
 
   <gf-form-switch