GP - Draw - Change Radius, Strenght before accept the shape (preview before acept)

Currently to Change Radius, Strenght we must accept the shape of curves etc by enter or MMB. This made often fake steps where users deleting object eg bad parameters on this, and starting again drawning coz menu is blocked to Change Radius, Strengh, other values. Suggestion is to:

• allow Change Radius, Strenght before accept
• by Change Radius, Strenght editing shape in something like preview mode

The issue is silimar to operate on viewport x,y,z axed by MMB when object is active with tool to scale, rotate.