Dialog boxes do not close with ESC key or have button focus

When a dialog box pops up in the application, it's customary to allow the ESC key to dismiss the dialog. This action cancels if that option is available or simply OK's the dialog if that is the only choice.

How to get this to happen:

• make local changes in a repo
• in Stash, click Pull to update from origin
• A dialog box titled "Pulling" appears with the text:

git -c diff.mnemonicprefix=false -c core.quotepath=false fetch origin

git -c diff.mnemonicprefix=false -c core.quotepath=false pull origin feature/xxx
fatal: Couldn't find remote ref feature/xxx

Unexpected end of command stream

Completed with errors, see above.

ESC or tabbing to the close button and hitting the space bar should dismiss it.