Need a way to sketch only on one habitat layer

[jeroens]

When sketching habitat layer content, Ecospace automatically adjusts the proportion of habitat area of other habitats to make sure the total amount of habitat in a cell does not exceed 1. This can be undesired when just wanting to explore the impact of changes in one habitat.

As a current work-around users can modify habitat area values in the grids of individual habitat layers, but that is a bit of an arduous process. It would be handy to be able to turn habitat area corrections on or off.