The gif test was manually activating the unfurling, which is no longer
necessary. Now check that enabling gifs will enable tenor unfurling
Also add a test for image unfurling and validate the unfurling image
links components and preview settings.
Enable preview for gifs after enabling the gif functionality
Disable gif functionality if the preview was disabled
Addition fixes
- The gifs weren't checked if all images weren't enabled
- The subdomain wasn't checked for whitelisting if the main domain wasn't enabled
- Image clicking
- Dismiss asking for unfurling was not updating the state
Considerations
- Looked into having the "gif enabled" - "tenor unfurling" relation
embedded in the controller but it would require extensive refactoring
by implementing a data-model for unfurling whitelisted domains
Closes: #6829