Final round of converting WebUI components

All my_* scopes that were used for authorization were substituted by
authorized scope. All enforce_* method and include Authorization
removed. Fixed some errors that appeared by host authorization, e.g.
ambigous columns names. Web UI should be ready for "after migration"
permissions now. There's still a lot of old code though, it's being
tracked however.
Add DB constaints and missing dependencies

Now when a role is removed, all its filters and their filterings are
removed as well. Same applies to permission removing. We also have
foreign keys that enforces valid filters and filterings.