Resolve 1193-website-branding-set-tab-text

Closes #1193 (closed)

Notes:

1. I know this could also have been achieved by simply switching around the strings in RccTitleService.updateTitle() instead of changing all calls to RccTitleService. However, I think my way makes more sense semantically – now setTitle() sets "Recovery Cat", which is the title of the entire page, and this title is then specified by suffixes like "AGB" etc.
2. For the e2e tests, assertHCPTitle() and assertPATTitle() are exactly the same. I propose making both a single function assertTitle() in e2e-utils.ts. Thoughts? ((Would have to be done by someone else as I'm on vacation next week))