Adding the ability to exclude frames from the compare view

[alexanderbock]

In many cases, the first x frames and final y frames are used to setup some global state and thus has some larger variation which makes it difficult to use average/stddev frametimes to compare performance changes. It would be nice to be able to manually exclude a number of frames in the beginning and end similar to how the histogram can be filtered based on the bin occupancy; a suggestion for that:

[wolfpld]

As a workaround you may increase the number of minimum values in a histogram bin to eliminate the outliers.

[alexanderbock]

:+1: I was doing that but it looks like that filtering doesn't update the Average/median/stddev time