can't read the branch name in rebase dialog

What steps will reproduce the problem?

1. use rebase dialog
2. try to pick source and target branch

What is the expected output? What do you see instead?

• the dropdowns selection area when open are large enough to display branch names
• the width of the dropdowns itself adjust to the width of the dialog

What version of TortoiseGit and Git are you using? On what operating system?

V2.1.0.0