New automation folder picker has two focus points

Testing #335507

When creating a new automation, right below the Prompt textarea, there is a folder picker. There are actually two tabstops to that folder picker, meaning that when someone tabs through the controls, tab lands twice on that folder picker.

When the focus border is not rounded, pressing Space or Enter does nothing. When the focus border is rounded, pressing Space or Enter works. Please remove the tabstop with the unrounded focus borders.