Revert "fix: disable loading when there are no more activities to load"

[nickvergessen]

This reverts commit 8fedeb9.

• Reverts [stable31] fix: disable loading when there are no more activities to load #1934

Without this pagination works totally fine. Otherwise pagination breaks when there was at least 1 grouped activity: #1931 (comment)

Steps to reproduce

• Do some activity that you will remember afterwards
• Create a folder
• Upload 100 screenshots
• Go to activity app
• Try to scroll down until you can see the activity from step 1

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 30.89%. Comparing base (183fbed) to head (a600f44).
Report is 2 commits behind head on stable31.

Files with missing lines	Patch %	Lines
src/views/ActivityAppFeed.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable31    #1959      +/-   ##
============================================
+ Coverage     30.85%   30.89%   +0.03%     
============================================
  Files            43       43              
  Lines          1617     1615       -2     
  Branches        110      110              
============================================
  Hits            499      499              
+ Misses         1092     1090       -2     
  Partials         26       26              

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