Review Request: Fix behavior of "runners" property

[Aurélien Gâteau]

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http://git.reviewboard.kde.org/r/105024/
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Review request for Plasma.


Description
-------

This commit changes the behavior of the "runners" property when no manager has been created yet:
- Setting the property emits runnersChanged() (unless it is the same as the old value)
- Reading the property after setting it returns the new value


Diffs
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  plasma/declarativeimports/krunnermodel/runnermodel.cpp 2717ef8 

Diff: http://git.reviewboard.kde.org/r/105024/diff/


Testing
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Run attached test script. Without the patch, output is:
"""
runners before: 
runners after:
"""

With the patch one gets:
"""
runners before: 
onRunnersChanged(): runners=services,shell
runners after: services,shell
"""


Thanks,

Aurélien Gâteau

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