[#1177] Show new plan contact count in menu

[Bartvaderkin]

No description provided.

[codecov-commenter]

Codecov Report

Merging #527 (5d0683a) into develop (462a316) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #527      +/-   ##
===========================================
+ Coverage    96.49%   96.51%   +0.01%     
===========================================
  Files          542      545       +3     
  Lines        19332    19425      +93     
===========================================
+ Hits         18655    18748      +93     
  Misses         677      677              

Impacted Files	Coverage Δ
...nwoner/plans/migrations/0013_auto_20230223_1115.py	100.00% <ø> (ø)
src/open_inwoner/accounts/models.py	97.91% <100.00%> (+0.04%)	⬆️
src/open_inwoner/accounts/tests/test_user.py	100.00% <100.00%> (ø)
...nwoner/plans/migrations/0014_auto_20230306_1017.py	100.00% <100.00%> (ø)
...er/plans/migrations/0015_plancontact_notify_new.py	100.00% <100.00%> (ø)
...ns/migrations/0016_alter_plancontact_notify_new.py	100.00% <100.00%> (ø)
src/open_inwoner/plans/models.py	98.61% <100.00%> (+0.08%)	⬆️
...c/open_inwoner/plans/tests/test_data_migrations.py	100.00% <100.00%> (ø)
src/open_inwoner/plans/tests/test_views.py	100.00% <100.00%> (ø)
src/open_inwoner/plans/views.py	97.90% <100.00%> (+0.02%)	⬆️
... and 1 more

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[Bartvaderkin]

I had to edit this existing migration to get the migration test to work.

[vaszig]

One remark concerning the creator of the plan. Do we want to show the count to the creator as well?I would expect this only for the contact, since the creator is already aware of the plan at this point.

[vaszig]

As mentioned in the previous comment, the number is shown for the creator as well.

[Bartvaderkin]

@vaszig Review is mostly about last two commits, although I had to rebase and force push.

[alextreme]

Can be merged