Fixed RebaseDialog usability improvements Some RebaseDialog usability improvements were merged to stable-2.11 in [1]. That patch was incompatible with master and got broken as soon as stable-2.11 was merged with master in [2]. This patch fixes [1] on master. [1] https://gerrit-review.googlesource.com/#/c/66543/ [2] https://gerrit-review.googlesource.com/#/c/67052/ Change-Id: I9e253bbedc299c198adb06fc32916334511c272d