kui's git branch command fails if the underlying git command decides to paginate

[starpit]

Kui's git branch command invokes the underlying git branch via PTY. By default, that underlying command will paginate the response. As a consequence, Kui's git branch command will hang, since the underlying git branch command is silently waiting for input from the user.

We should have Kui invoke the underlying command with --no-pager

[starpit]

the fix was incomplete, e.g. it may not have fixed the inBrowser use case