Using keyboard navigation to tab after the Manage Picklists is not providing visible focus on the 'Close' button and is not providing the correct navigation.
Log into a server with at least (1) Custom Master Object configured
With the keyboard only, navigate to the Custom Object Icon in the main navigation, select ENTER to expose the Custom Object Tiles page
Select the Tab key to establish focus on the Configure button
Select the Tab key to establish focus on the first Custom Object Tile
Select the Tab key to navigate horizontally to another Custom Object Tile
Select the ENTER key to drill into the listing of Custom Objects instances for the custom object type
Due to issue above, select the tab key to establish focus on the upper left arrow button navigation element
Use the right arrow keys to navigate to the View Options button and select Enter to open the panel
Select the Tab key to navigate to the last entry in the panel 'Manage Picklists'
Select the Tab key
Expected: Visible focus to be established on the close button
Actual: No Visible focus. When the user sects the tab key, they are taken to the page URL
DE78629 - Fixed in 16.2.1