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Remove disallowed services such as xdg-open when doing queryByMimetype

Akseli Lahtinen requested to merge work/akselmo/avoid-endless-loop-xdg-open into master

Alternative to: kio!1732 (merged)

Some applications set their file mimetypes to open with "xdg-open" which then causes it open in "kde-open", which then ends up calling itself constantly and endlessly, spiking CPU.

Instead, catch that early on and remove them from services list.

BUG:494335

How to test:

  1. Create empty file
  2. Set that file to always open with xdg-open or kde-open
  3. Try opening the file with xdg-open or kde-open inside terminal
  4. Try opening the file from Dolphin by clicking on it
  5. It should always ask for the application to open with now
Edited by Akseli Lahtinen

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