The new controls on the Host Apps tab (details group, view overrides button) needs to look nicer:
Should have reasonable amount of space between Details group and button below it
Also space between the buttons / details group and the list on the left
'View Overrides' isn't quite right. Maybe 'Open Override' to better indicate that we might create an override. And use singular 'override' not 'overrides' to make it clearer this is for the selected app
When no app is selected disable the button and maybe disable all the textboxes
The new controls on the Host Apps tab (details group, view overrides button) needs to look nicer: