[stable30] fix: disable loading when there are no more activities to load

[backportbot]

Backport of #1931

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 3 lines in your changes missing coverage. Please review.

Project coverage is 30.85%. Comparing base (587f01e) to head (7ba7f24).

Files with missing lines	Patch %	Lines
src/views/ActivityAppFeed.vue	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable30    #1933      +/-   ##
============================================
- Coverage     30.89%   30.85%   -0.04%     
============================================
  Files            43       43              
  Lines          1615     1617       +2     
  Branches        110      110              
============================================
  Hits            499      499              
- Misses         1090     1092       +2     
  Partials         26       26              

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[cypress]

Activity    Run #2431

Run Properties:   Failed #2431  •  d58fcca589: [stable30] fix: disable loading when there are no more activities to load

Project	Activity
Branch Review	backport/1931/stable30
Run status	Failed #2431
Run duration	04m 06s
Commit	d58fcca589: [stable30] 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	3
Flaky	0
Pending	0
Skipped	0
Passing	7
View all changes introduced in this branch ↗︎

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Tests for review

  cypress/e2e/sidebar.cy.ts • 3 failed tests • Run E2E

View Output

Test		Artifacts
Check activity listing in the sidebar > Has share activity		Test Replay Screenshots
Check activity listing in the sidebar > Has tag activity		Test Replay Screenshots
Check activity listing in the sidebar > Has comment activity		Test Replay Screenshots

[nickvergessen]

This just breaks combined activities: #1959