Review Request 127044: Show a warning if there's an error in the Engine

[Aleix Pol Gonzalez]

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https://git.reviewboard.kde.org/r/127044/
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Review request for KDE Frameworks and Jeremy Whiting.


Repository: knewstuff


Description
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So that we can know what's going on if things don't go smoothly.

Note the signal used to be emitted but nobody was listening to it.


Diffs
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  src/downloadmanager.h 1990ef1 
  src/downloadmanager.cpp c99c524 

Diff: https://git.reviewboard.kde.org/r/127044/diff/


Testing
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Thanks,

Aleix Pol Gonzalez

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