This PR is based off of #18431.
IMPORTANT NOTE: This PR is still using angularjs for expression evaluation. There doesn't seem to be an established library to do something similar, though a handful exist (none of them seem very popular). We'll either have to use one of those or roll our own. I'm not sure which is the best option, but suggestions are welcome.
UI tests passing for this one (some screenshots in plugins need an update, but holding off on that until after the specific PRs are merged)
This issue is in "needs review" but there has been no activity for 7 days. ping @matomo-org/core-reviewers
@diosmosis hasn't finished reviewing the VUE code on that one, but did resolve conflicts for that one, can you review the merge conflicts, in case I merge the wrong parts.
@sgiehl I will take a look as soon as I can but I will be pretty busy with other things for the moment.
@diosmosis no problem. Btw. I found another regression in TagManager (top controls aren't visible anymore). Shall I create a issue for that and assign it to you?