Hidden system tags do not appear (only after click) and do not disappear

[Stephan Doerfel]

a) The hidden system tag icon now needs to be clicked to see the system tags. I would prefer that the system tags appear on mouse over.

b) Once I clicked the symbol, the system tag appears but I cannot make it disappear again

c) the system tag icon should be shown after the tag icon as system tags are tags

[Sebastian Böttger]

a) I'm not agreed with your suggestion. I'd suggest: do not use mouse overs! If you want to suggest it anyway, then make a separate issue for that. b + c) already solved (see at bootstrap3 branch)

Generally, please use the search function to find out, if an issue already tracked.