Overlay decorations use incorrect absolute pixel placement: relative to wrong parent

[robobenklein]

https://philipwalton.com/articles/what-no-one-told-you-about-z-index/

turns out new stacking contexts are created by the patches since will-change: transform causes the css transform property to apply without a value, creating the new stacking (and thus positioning) context from the patch

the texteditorcomponent overlay decoration pixel values need to be offset by the patch's client position relative to the parent stacking context in the OverlayComponent's update

[robobenklein]

f0eecc2 works for the normal 2 patches/strip, but with only one patch in a strip it breaks again