Low Importance controls for exhausted values

[AlbinoGeek]

Is your feature request related to a problem? Please describe.
I don't like having to keep track of how many 1s I've placed, whether it be 8 or 9, etc.

Describe the solution you'd like
When I have placed as many of a value as there are boxes, (where each box has at least one of said value); the corresponding control should be have reduced importance to indicate I have exhausted that value.

I should not be prevented from placing the value.