[stable29] fix: disable loading when there are no more activities to load

[backportbot]

Backport of #1931

Resolves #1946

Warning, This backport's changes differ from the original and might be incomplete ⚠️

Todo

• Review and resolve any conflicts
• Amend HEAD commit to remove the line stating to skip CI

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 41.93%. Comparing base (41adcde) to head (520f4a5).
Report is 4 commits behind head on stable29.

Files with missing lines	Patch %	Lines
src/views/ActivityAppFeed.vue	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable29    #1932      +/-   ##
============================================
- Coverage     41.96%   41.93%   -0.04%     
============================================
  Files            43       43              
  Lines          3839     3842       +3     
  Branches        110      110              
============================================
  Hits           1611     1611              
- Misses         2202     2205       +3     
  Partials         26       26              

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[cypress]

Activity    Run #2401

Run Properties:   Passed #2401  •  951d81ad31: [stable29] fix: disable loading when there are no more activities to load

Project	Activity
Branch Review	backport/1931/stable29
Run status	Passed #2401
Run duration	03m 34s
Commit	951d81ad31: [stable29] fix: disable loading when there are no more activities to load
Committer	backportbot[bot]
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	4
Pending	0
Skipped	0
Passing	10
View all changes introduced in this branch ↗︎