fix annoying behaviour in webkit browsers when middle-clicking (open in new tab) on a build, it used to open the build both in new tab as current tab

Created by  Rob Vermaas  on November 19, 2011
RH2BAJ6KVP2M7AKCVZTPZBENJ3UWWZT7JLO63PPZY2MSLEQ5UMVQC
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