Issue Summary

When a user presses the F keyboard shortcut or manually selects the board filter, Trello will focus on the close button (X icon) instead of the filter text field.

Steps to Reproduce

1. Open a board
2. Press F or manually selects the board filter
3. Try entering any text, and you'll noticed the filter's focus isn't on the text field but on the close icon

Expected Results

Selecting the board filter should automatically focus on the filter text field so users can filter their cards.

Actual Results

The board filter automatically focuses on the close icon instead of the text field, where users can filter for their cards.

Workaround

Users can manually select the filter text field so that they can input the keywords they want to use to filter for their cards.