The edit field of the "Rename Branch" dialog cannot be accessed via the keyboard

SETUP:

I right-click a branch in the Sidebar list of Branches, I then click "Rename...".  I'm presented with a modal dialog box entitled "Rename Branch".  The edit field is pre-populated with the current branch name.

EXPECTED BEHAVIOR:

The contents of the edit field would be selected, so that I can type a new name, replacing the current branch name with one of my choosing.  When I'm done, I can use Enter or Esc to commit or cancel my change.  Alternatively, I can use the Tab key to cycle the highlight through the three controls present in the box - the edit field, the OK button and the Cancel button

ACTUAL BEHAVIOR:

The contents of the edit field are not selected, and the edit field doesn't have focus, so my typing goes nowhere.  Also, tabbing around doesn't cycle the highlighted control.  I can, however click on the edit field to place the cursor or highlight text.  Once this field is active, I can use Enter or Esc to commit or cancel my change.