Escape key to close MR check out branch modal
Description
When a modal dialog such as the helpful "Check out branch" popover is visible, I naturally reach for the escape key to close it when I'm finished reading/processing it. Unfortunately that does nothing, so I have to click the "X" icon to close it.
Proposal
Listen for the "escape" keypress when the modal dialog is open, and then close it.
Links / references
similar to #15432 (closed)