Enhancement: Making automated naming easier to read

[ahobeost]

As a User, I would like to scan the variables, to quickly find the one I need.
This is harder, when the automated variables are camel case in the final ddck.

CollA
CollB
CollC
CollD
CollE
CollF
CollG

Coll_A
Coll_B
Coll_C
Coll_D
Coll_E
Coll_F
Coll_G

In the latter case, the "Coll" part is ignored more easily and one can scan the variables more easily.

For the code, this only means that we should add an underscore between the directory name "Coll" and the variable name.