Rudder

Currently, there are two problems with the list of parent categories in the "new group" popup:

1. The first issue is that a seemingly random Group category name is selected by default
2. The second issue is that the list of group categoriess does not reflect the hierarchy of the group categories : it is probably alphabetical, but it should instead be the same order as on the main page, something like :

Root of the group and group categories
- Cat1
-- Group A
-- Group B
- Cat2
-- Group C
-- Group D