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

Dependencies

• [2] 2JMJKP4P
• [3] 4S4ZMFJK * Links on trs.
• [4] JRU2LRPZ
• [5] L7LFU6IQ * Make build steps clickable as well.
• [6] QZLMDKMU * Queue runner: don't start scheduled builds builds if they belong to
• [7] JLDUSNUO * Unify rendering of finished and scheduled builds.
• [*] IK53RV4V

Change contents

• replacement in src/root/common.tt at line 100
  [3.182]→[3.115:193](∅→∅),[2.260]→[3.115:193](∅→∅),[3.264]→[3.115:193](∅→∅),[3.115]→[3.115:193](∅→∅)
  − onclick="window.location = '[% c.uri_for('/build' build.id) %]'">
  [2.260]

  [3.1238]
  + onclick="if(event.which == 2) return true ; window.location = '[% c.uri_for('/build' build.id) %]'">