Add multi-select option to push/pull/tag/branch/checkout

We have a large project, which is split into > 20 Git repositories containing different modules of the system. Depending on the part a developer is working on, he will have local clones of 10-15 repositories.

It would be extremely handy (and time saving), when the commands for push, pull, tag, branch and checkout can work on a group of bookmarked repositories, either by a multi-select option, or by using the operation on a bookmark folder.

This way the developer can quickly switch between develop, release and feature branches. At the moment we can only use command line scripts to accommodate this.