Do not reset the list after adding cached entries

[nickvergessen]

Steps

1. Create access control rule 1:
   • File system tag - is tagged with - test
   • User group membership - is member of - group
2. Create access control rule 2:
   • File system tag - is tagged with - test
   • User group membership - is not ❗️ member of - group
3. Refresh the page

Expected

Rule 1:

• File system tag - is tagged with - test
• User group membership - is member of - group
  Rule 2:
• File system tag - is tagged with - test
• User group membership - is not member of - group

Actual

Rule 1:

• File system tag - is tagged with - test
• User group membership - is member of - group
  Rule 2:
• User group membership - is not member of - group

Found while looking into https://help.nextcloud.com/t/files-access-control-issue-with-browsing-folders/3608/3

[mention-bot]

@nickvergessen, thanks for your PR! By analyzing the history of the files in this pull request, we identified @MorrisJobke to be a potential reviewer.

[nickvergessen]

Let me write unit tests for this

[MorrisJobke]

Tested and works 👍

[codecov-io]

Current coverage is 57.32% (diff: 100%)

Merging #1771 into master will increase coverage by 0.05%

@@             master      #1771   diff @@
==========================================
  Files          1075       1075          
  Lines         61278      61291    +13   
  Methods        6864       6864          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits          35092      35134    +42   
+ Misses        26186      26157    -29   
  Partials          0          0          

Diff Coverage	File Path
•••••••••• 100%	apps/workflowengine/lib/Manager.php

Powered by Codecov. Last update 6375790...4d6ec43

[LukasReschke]

LGTM