I actually have the same issue brand new install of 4.1.8+ and if I hover over the three lines to try to drag and drop I just have a grey or red crossed out circle. Any thoughts? have tried multiple OS and Browser combos and same issue.
The survey must be deactivated and there is a lock/unlock icon at the top of the structure list that must be unlocked (I have no clue what the benefit of that "feature" is).
Cheers,
Tony Partner Solutions, code and workarounds presented in these forums are given without any warranty, implied or otherwise.