Warn user when creating branch that exists on remote
Warn user when creating branch that exists on remote

The Create-Branch-Dialog now will detect if the branch name entered exists on remote and notifies the user before creating it.

They can still create it, but will be notified to inform their decision.

say25/desktop,shiftkey/desktop,say25/desktop,shiftkey/desktop,desktop/desktop,desktop/desktop,j-f1/forked-desktop,say25/desktop,j-f1/forked-desktop,artivilla/desktop,j-f1/forked-desktop,kactus-io/kactus,desktop/desktop,artivilla/desktop,say25/desktop,j-f1/forked-desktop,kactus-io/kactus,desktop/desktop,kactus-io/kactus,shiftkey/desktop,kactus-io/kactus,shiftkey/desktop,artivilla/desktop,artivilla/desktop