Support wildcard matches for media controls settings
Allows disabling media controls on an entire domain,
for example https://*.kde.org will match https://kde.org
as well as all subdomains.
I was able to e.g. blacklist https://*.zoom.us and had media controls disabled for zoom.us as well as all subdomains. You are still able to turn media controls back on on a specific subdomain manually in the popup.
With this we can then ship a bunch of default rules, cf. !41
I am also working on a config UI for options page but I don't think it's strictly necessary for this feature.