order of layers in steps / chapters

[aprossi]

Currently the order follow numbers, i.e.

• lower numbers - layers on top, e.g. "0" refers to the topmost layer
• higher numbers - layers below, e.g. "4 is lower than 3"

To be clarified/commented in v4 data structure and future ones:

• higher number - higher geometrrically (e.g. lines over polygons
• lowest number 10 (so we can have 10 spare positions

[aprossi]

implemented in current app draft, closing.