When I select multiple clips in the timeline, ones that have transitions on them as well, the transitions don't get automatically selected. In fact, they move behind the clips, so when you move the clips in the timeline, they don't move along with it.

Reproducible: Always

Steps to Reproduce:
1. Insert clips into timeline.
2. Add transitions between those clips
3. Select the multiple clips with transitions on/in them and try to move the clips in timeline.

Actual Results:  
The transitions are moved behind the selected clips, making them unable to be seen. They aren't selected, either, which means you have to move them manually to place them in the correct place again.

Expected Results:  
The transitions to be automatically selected when a clip with the transitions is selected. Also, to have them not disappear behind the clips. Also, to have them move with the clips when they're moved to a different location in the timeline.

Bug discovered while using the latest Kdenlive git build from Kubuntu-ci/unstable ppa.