UI-pause downloads when offline

[BPerlakiH]

Fixes: #1419

ipad_airplane_mode.mov

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.59%. Comparing base (3f24a09) to head (bc6bae1).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1424   +/-   ##
=======================================
  Coverage   92.59%   92.59%           
=======================================
  Files          18       18           
  Lines         878      878           
=======================================
  Hits          813      813           
  Misses         65       65           

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