Minerva Desktop: Remove toggling sections

Remove toggleable sections from desktop Minerva version, they are useless,
because there aren't sections in DOM.

follows up (needed var): I46d9a2eac632bb67b5a7f9c040b718abe2258b04

Bug: 67105
Change-Id: I49b40034a621625ffac79a5d5664aaaf9d16d95b
Merge "Minerva Desktop: Remove toggling sections"