Please add an option to set flow rate for walls separately

[VaLLDaR]

Hi!
In current version of orca we can set flow rate for initial layer separately and it includes walls and bottom.

But it is VERY useful to set flow rate for initial layer walls and initial layer bottom separately.
Like we have in CURA slicer:

Often i need to adjust flow rate specifically for initial layer walls to improve adhesion.
Please add this feature in future versions of orca slicer!