Migrates to Bootstrap 5, closes #266

[ogarcia]

If I have not forgotten anything with this change Bootstrap is updated to the latest version (right now the 5.3.3). As with the previous version both CSS and JS is embedded in the static directory so you don't have to go looking for these files anywhere.

Before merging this PR it would be best to do some tests in case something goes wrong. I have tested with Firefox and Chrome and everything is fine, but four eyes see more than two.

I have found a bug that is not due to this change (it happens with the current version) and it is that it is not possible to change the email address. From what I have seen it seems to me that the function that handles the post to changemail is not complete, it picks up the address that is passed by the form but does nothing with it.

Of course, any comments are welcome.

[codecov]

Codecov Report

Attention: Patch coverage is 96.36364% with 2 lines in your changes missing coverage. Please review.

Project coverage is 86.00%. Comparing base (bd53ac0) to head (ecf7878).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
supysonic/frontend/user.py	94.73%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #267      +/-   ##
==========================================
- Coverage   86.04%   86.00%   -0.04%     
==========================================
  Files          47       47              
  Lines        3898     3902       +4     
==========================================
+ Hits         3354     3356       +2     
- Misses        544      546       +2     

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[ogarcia]

Holy shit, the unit tests! Tomorrow I'll take a look at them, it will be something silly. 😜

Update: Fixed! (at least I think so)

[ogarcia]

From my point of view I think I have corrected everything and this PR is ready to merge. If there are any problems, let me know.

[baldurmen]

Are you the author of that file? If not, it would be good to make sure to mention its license somewhere

[ogarcia]

It is one of the Bootstrap icons (like the rest of the icons on the page).