GUI: Corrected rotation of horizontal cylinders for real-space visualization

This resolves #265 (closed)

There was no bug in rotation mechanism.

The rotation angles of HorizontalCylinder are set to correct values now.

added 3DView GUI labels

requested review from @j.wuttke

assigned to @m.svechnikov

changed title from Fixed rotation of horizontal cylinders for real-space visualization to GUI: Corrected rotation of horizontal cylinders for real-space visualization

approved this merge request

ok

merged

mentioned in commit aaea4ba2