- Shows website_menu checkbox
- Added button to duplicate an event with its website when website_menu is True
- Delete the website attached to an event when that last is deleted

Squash of the following commits:
[IMP] Removed dot files and fix pre-commit issues
[IMP] Added more test coverage
[IMP] More test cover
[IMP] More test cover
[IMP] Added missing dosctring and trimed too long lines
[IMP] Added tests coverage
[WIP] Added copy and delete of website event views
[WIP] Copy and delete cascade on event website