Merge branch 'aqua-ctxbut' of github.com:ZhongRuoyu/gitk * 'aqua-ctxbut' of github.com:ZhongRuoyu/gitk: gitk: use <Button-3> for ctx menus on macOS with Tcl 8.7+ Signed-off-by: Johannes Sixt <j6t@kdbg.org>