Ability to filter PR files list by using simple text input accepting regex, wildcards etc.

Hi

Sometimes working with a bigger pull request I would like to have a possibility to filter displayed files according to some patterns to prevent scrolling long page content and allow to focus on specific areas at once.
For example I want to focus first on *.js files, next on *.spec.js next on *.html and so on. Filter should be done on frontend (no reload necessary) and should IMO hide completely files that doesn't meet the pattern.
Of course UX should take into consideration all aspects like:

• explicity marked filter-mode (some icon on the left side menu? some background color change?)
• no possibility to approve until filter active

I think a good place to place this filter input field might be next to Files changed (NN) message.

Also I wanted to mention that the file view panels should be collapsible (regardless the file size) but I noticed something similar already reported: BCLOUD-7086