Disable deleting of default dashboard

[johannaengland]

This will disable deleting of a dashboard if it is the default on and show an alert box why it was not possible to delete the dashboard.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	992		0	12.79s
✅ PYTHON	ruff	988		0	0.11s

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[github-actions]

Test results

    9 files      9 suites   8m 8s ⏱️
2 143 tests 2 143 ✅ 0 💤 0 ❌
4 025 runs  4 025 ✅ 0 💤 0 ❌

Results for commit 6c55c5a.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.40%. Comparing base (6b1b864) to head (6c55c5a).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3233   +/-   ##
=======================================
  Coverage   60.40%   60.40%           
=======================================
  Files         605      605           
  Lines       43683    43685    +2     
  Branches       48       48           
=======================================
+ Hits        26385    26388    +3     
+ Misses      17286    17285    -1     
  Partials       12       12           

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[stveit]

Is the end goal avoiding the default dashboard from being deleted, or avoiding that there is no default dashboard? #3150 described the expected behaviour to be that if the original dashboard is deleted, then another dashboard (assuming there are more than one) should become the new default. So if someone has 2 dashboard, then its fine for the default to be deleted.

Assuming that is how we want to solve this, I feel like the error message should be something along the lines of "You cannot delete your last dashboard", since there situations where it actually is okay to delete the dashboard

[johannaengland]

Is the end goal avoiding the default dashboard from being deleted, or avoiding that there is no default dashboard? #3150 described the expected behaviour to be that if the original dashboard is deleted, then another dashboard (assuming there are more than one) should become the new default. So if someone has 2 dashboard, then its fine for the default to be deleted.

Assuming that is how we want to solve this, I feel like the error message should be something along the lines of "You cannot delete your last dashboard", since there situations where it actually is okay to delete the dashboard

I will edit the original issue, because in the meantime @lunkwill42 and I decided it is better to outright disable deletion of the default dashboard.

Another part of fixing this that is on the way is adding two migrations that will ensure that after applying them every user will have exactly one dashboard.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud