Revert "Merge pull request #1093 from christopheschwyzer/issue-1093"

This reverts commit 4afb957c1f2135d8cc9b32a95c725cb864faf7f5, reversing
changes made to 4f97125232640045c426a0347dca4c3b1abf42e6.
Merge pull request #1094 from njam/issue-1094

Downgrade select2