Add page title to destinations, timeslots and profiles pages

[johannaengland]

Screenshots:
Before:

After:

This applies to the pages
http://localhost:8000/destinations/

http://localhost:8000/timeslots/
http://localhost:8000/timeslots/create/
http://localhost:8000/timeslots/<id>/
http://localhost:8000/timeslots/<id>/update/
http://localhost:8000/timeslots/<id>/delete/

http://localhost:8000/notificationprofiles/
http://localhost:8000/notificationprofiles/create/

[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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 22.22222% with 7 lines in your changes missing coverage. Please review.

Project coverage is 79.73%. Comparing base (035e3fd) to head (bef35a3).

Files with missing lines	Patch %	Lines
src/argus/htmx/notificationprofile/views.py	25.00%	3 Missing ⚠️
src/argus/htmx/timeslot/views.py	25.00%	3 Missing ⚠️
src/argus/htmx/auth/views.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1126      +/-   ##
==========================================
- Coverage   79.83%   79.73%   -0.10%     
==========================================
  Files         145      145              
  Lines        5267     5276       +9     
==========================================
+ Hits         4205     4207       +2     
- Misses       1062     1069       +7     

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