Sentry bug report

[thePeras]

Closes #792
No more automatically GitHub issues created from user report, removing service secret from beeing send with in the app bundle.
When user submits an report, captureMessage creates a new sentry Event and a user feedback is appended to it.
Also, a sentry Alert Rule was created to send the user feeback to an appropriate slack channel, so everyone interested can be notify and start a discussion with the others.

Review checklist

• Terms and conditions reflect the current change
• Contains enough appropriate tests
• If aimed at production, writes a new summary in whatsnew/whatsnew-pt-PT
• Properly adds an entry in changelog.md with the change
• If PR includes UI updates/additions, its description has screenshots
• Behavior is as expected
• Clean, well-structured code

[codecov]

Codecov Report

Merging #925 (12f5a9d) into develop (9087e05) will not change coverage.
Report is 2 commits behind head on develop.
The diff coverage is n/a.

Additional details and impacted files

@@          Coverage Diff           @@
##           develop   #925   +/-   ##
======================================
  Coverage       22%    22%           
======================================
  Files          136    136           
  Lines         3539   3539           
======================================
  Hits           759    759           
  Misses        2780   2780           

[LuisDuarte1]

LGTM nice job 🚀