Resolve "MolArt is missing in the context menu (right click). // minerva v14"

Closes #886 (closed)

changed milestone to %v14.0.0~alpha.1

added BUG graphics; css; layout labels

added 4 commits

• 6556859d - 1 commit from branch master
• d2d1602b - changelog updated
• 5a19f11e - problem with loading molart fixed
• eaca1954 - context menu visualization fixed - it's slightly different in bootstrap 4

Compare with previous version

unmarked as a Work In Progress

enabled an automatic merge when the pipeline for eaca1954 succeeds

mentioned in commit 43779e8f

merged