Drawings/Mouse Gesture color picker & drawing background bug report

Describe the bug
1、Drawings/Mouse Gesture color picker doesn't have the transparency slider.
2、When Safari fullscreen, there is no drawing line and drawing background


Device information:

  • Type of Mac: MacBook Pro (Retina, 15-inch, Mid 2015)
  • macOS version: 10.14.5
  • BetterTouchTool version: 2.835

**Additional information :