When tag is renamed, editbox should become first repsonder

### Current
When tags in the sidebar are in edit mode, and the user taps on tag, they will see a tag rename pop-up. The issue is that focus is not automatically set to input in the pop-up, forcing the user to make one additional tap.

### Proposed
When tag is tapped in edit mode, the focus should be set to input and keyboard should be show.

### Why
Fewer taps

Start at the Android tag sidebar edit flow and locate the rename pop-up opened when a tag is tapped. Verify the input receives focus and the keyboard appears immediately; the issue does not name a specific file or test to run.

Written by the indexing model from the issue text.