Page management - Warnings are not shown properly when menu name is long

1. Login to CMS
2. Navigate to channel manager >> Any channel >> edit channel >> edit menu
3. Create a new menu with very long Label value

Expected - User should be able to create the long menu without any errors
Actual - Notice there some pop-up stuck in the iframe (refer screenshot)

This happens in page settings dialog as well when page title is long (refer screenshot cms7-7862b.png)