Design task: T65841
The patch makes some changes to how channels are drawn in the graph editor, with the main purpose of changing the position of the colored squares (currently under the visibility icon), since they were often conflicting with the new icon style.
- The backdrop is a bit thinned on both sides, leaving the visibility icon out of it on the left and leaving space for the scroll bar on the right.
- The colored squares are thinned as well and they are drawn on the right side, at the end of the channels. If the curve is hidden then the color gets a bit darker.
Before and after: