Flow multiplier (all)
Material flow multiplier when printing with this 
brush.
Reduce or increase to artificially push less
or more plastic.
To avoid exceeding the maximal flow rate, 
printing speed is decreased whenever flow multiplier
is over 1. 
In the case of infill, the multiplier may vary to
accommodate for lack of space.
For bridges, the flow is additionally increased by 20%. 
This multiplier does not apply to the following:
	- tower
	- brim
	- shield.
Please beware that the setting 
'Speed change exponent w.r.t. flow' also impacts
printing speed.
