Admin: Add link to create slides for presentation-AKs only to status page

changed milestone to %KIF 50,0

added feature label

Will probably be obsolete once #123 is done completely and the export form in integrated in the new status page (#105), but this seems to be a useful quickfix that can be done with very little effort.

assigned to @bhaettasch

mentioned in commit cde9f170

mentioned in merge request !119 (merged)

mentioned in commit 09190d05

closed with commit 09190d05

mentioned in commit 40b927d3