Linked elements should be selectable

Hi Babynus,

considering have had a meeting, which took decisions, we may link decisions to meeting minutes. This works fine. Same for questions.

1. If you are in meetings, it would be fine to click on linked decisions and they are opened up. Vice versa, being in decisions to click on linked meeting and open up meeting.
2. In the same manner it should work with all links. For example, to be in activities and link to predessor or successor.
3. From activities it should be possible to link to ticket (which is request). From ticket to activity it is possible.

Klaus