Issue title: Form token invalid or timed out
 Issue body: Hi there, i am unable to logout nor change any settings after being connected for  a while (more than 24 hours)
On every page refresh i keep seeing "Form token invalid or timed out" and so i am unable to perform any action. The only way to solve is by cleaning browser cache, sessions and cookies. Is there any way we can prevent this behavior?
Thanks
 Comments: 
 Comment 0: I recognized that on my mobile (Android / Chrome) i always geht 'Form token invalid or timed out' - on my Desktop Chrome everything works fine.
 Comment 1: Getting the same issue right now, is there a fix/workaround?
 Comment 2: I think the major problem is the switching IP (cellular/wifi) and the session binding. I think it is safe to remove the IP check and, if any, replace it by something fail-safe. 
 Comment 3: Or... wait. I think I removed that check a while ago. This probably happens after a browser update, which happens often on mobile.
 Comment 4: I installed Firefox on my phone and it worked straight away, tried clearing all browser data on Chrome even using incognito and it kept popping up with the same error. I'll keep Firefox in case I need it again for that :)
 Comment 5: This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

{'source': 'GithubIssues', 'repo_name_with_owner': 'mailcow/mailcow-dockerized', 'issue_id': 310712703, 'repo_stars': 5621.0}