Set up `mailto:` link with inserted current URL for feedback

See https://wiki1.hbz-nrw.de/x/BgCHAg
Remove spatial and lobid links from details view

See https://wiki1.hbz-nrw.de/x/BgCHAg
Update advanced search

- Remove nwbibsubject and nwbibspatial options
- Disable autosuggest for norm data
- Fix title suggestions

See https://wiki1.hbz-nrw.de/x/BgCHAg
Add table of contents link to details view (e.g. HT017670860)

See https://wiki1.hbz-nrw.de/x/BgCHAg