"full" overview ruler decorations overlapping others should be vertically aligned

Current:

![image](https://user-images.githubusercontent.com/2193314/158841872-5dc5161c-1442-4674-b640-f899457a7e9e.png)

Expected:

![image](https://user-images.githubusercontent.com/2193314/158841965-02cb18d4-5e5b-435e-9028-e80a110ae2b4.png)
