Comment 2 for bug 700783

In normal operation there are more input images (upper row) than different lenses (lower row). This explains the deliberate height difference between upper and lower row.

In the specific case of the attached snapshot it would make sense to switch to equal height, but this is an exceptional case. Most users work with a single lens and for them the lower row is too big, not too small.

I see a few possibilities to accommodate your needs, such as adding a slider to move the boundary between the two rows or letting the software decide where to put it based on the number of images and of lenses in the project. This second solution would be questionable from a usability point of view, and in general I see little benefit to such a change.

There is definitely nothing "wrong" height the height of the lists. If you feel that it can be improved, patches are welcome.