CutLog v7.21

CutLog v7.21 release changes

Main changes:

- Paint sawlog profile with solid color
- change Twitter logo to X
- Many internal optimizations
- core visual component upgrade

Paint sawlog profile with solid color

For better presentation is SawLog profile filled with solid color. Until now, there has been only two circles, which has not been such clear in some cases. Now with filled area it is much better to imagine sawlog profile. See next image for better understanding