[Merge] ~ubuntustudio-dev/casper:main into casper:main

[Dan Bungert]

Review: Needs Information

Hi Erich,

The change looks reasonable.  I really know nothing though about plasma though.  Is there benefit to just adding the new elif case and leaving the existing one, or do you have reason to be certain that plasma.desktop is not to be considered?
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https://code.launchpad.net/~ubuntustudio-dev/casper/+git/casper/+merge/473183
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