`focus` the Boards/Library Manager `<input>` when the widget opens

[kittaakos]

Describe the problem

When I open the library or board manager widget, I want to have the focus on the <input> so that I can type without clicking anywhere. It's a regression.

2.0.0:

focus_200.mp4

2.0.4:

focus_204.mp4

To reproduce

• create a new sketch (or reset the workbench layout),
• open the library or boards manager widget,
• the focus is not on the <input>

Expected behavior

2.0.0 behavior

Arduino IDE version

2.0.4

Operating system

macOS

Operating system version

12.6.3

Additional context

No response

Issue checklist

• I searched for previous reports in the issue tracker
• I verified the problem still occurs when using the latest nightly build
• My report contains all necessary details