Added Install Buffers to each configuration

[Eltord]

Created new variables to each configuration for install buffers

Added the calculation to add buffer to estimated time for presenting to user

[drtaru]

Hey Eltord,

This is already what the correctionCoeficcient value on #L135 does, if you look starting on #L2251 the size is multiplied by the coefficient to inflate the value. Simply increase the correctionCoefficient value to pad the install time.

[Eltord]

So with some work I was still unable to get the desired results with the correctionCoeficcient value as the different configurations required different "fudge factors", so at a minimum the factors would need a different value per configuration. I've discussed this in an FR I put in previously for this as well.