Display current active branch name in tina sidebar

[Perni1984]

We are currently using the branch switcher experimental switch and also the TinaAdmin experimental switch. We really enjoy both experiences so far, one small thing we are missing is to immediately understand in which branch we are currently in, so we would propose to print the current selected branch like this besides "No changes / Unsaved Changes":

[logan-anderson]

@Perni1984 We totally agree! this has been on our minds too and I agree that is a good spot for the branch name to be.

This is in our upcoming work and will be tracked here: #2263

Thanks for bringing this up! your feedback is valuable 😄

cc @Enigmatical