Tab created with "New File" should gain focus

v1.2.2
- In the left "Project" tab, right-click and select "New File".
- input a name.
- A new tab is created for the file but does not have cursor focus.

Would expect new tab to have focus so you can immediately start typing instead of having to click into the new tab.

Start by reproducing the Project tab's right-click, New File workflow and trace the entry point that creates the file tab. Check how focus is assigned after creation, then verify that the new tab accepts typing immediately without an extra click.

Written by the indexing model from the issue text.