[Nepomuk] The "Stop Query" Button (Right Way)

[Who Knows]

 I am sorry for the earlier version as it had mistakes and did not get the
job done, i have fixed it but since i am not able to run the query to check
it myself, i request you guys to inform me if there are any irregularities,
i will get them sorted ASAP, again sorry for the blunder earlier .

 Also my real name is "Smit Shah" for future references.
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