show brief list of changed files
### Description
I would like to be able to see the list of files that changed between tags or branches: the equivalent of
```diff --brief --recursive tag1 tag2```
And then be able to drill down into the actual changes.
I could not figure out how to do it in the UI, it always goes deep and shows me the actual changes, which may be overwelming.
Apologies if I missed something, but I looked hard.
### Proposal
### Links / references
issue