Use nextcloud/vue buttons

[raimund-schluessler]

• [ ] Replace button in trash bin
• [ ] Load and delete completed tasks
• [ ] Increase required server version to 23

[codecov[bot]]

Codecov Report

Merging #1820 (594a835) into master (0189a11) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 594a835 differs from pull request most recent head c80ebba. Consider uploading reports for the commit c80ebba to get more accurate results

@@            Coverage Diff            @@
##             master    #1820   +/-   ##
=========================================
  Coverage     29.15%   29.15%           
  Complexity       41       41           
=========================================
  Files            69       69           
  Lines          2994     2994           
  Branches        667      667           
=========================================
  Hits            873      873           
  Misses         2121     2121