Added a new "Sharpen Less" kernel to the filter compositor node. The intent here is to provide a much less aggressive sharpening filter that can't simply be solved by toning down the factor on the existing sharpen filter.
The existing "Sharpen" filter uses a "box" kernel:
```
-1 -1 -1
-1 9 -1
-1 -1 -1
```
The new "Sharpen Less" filter uses a "diamond" kernel:
```
0 -1 0
-1 5 -1
0 -1 0
```