Hi @BurningTreeC apologies I merged these without properly looking at them, but I think we should move them to 5.1.19 because:
* On Chrome, the new version hides the resize handle on textarea, which can be quite useful
* It's visually quite different, and I think might benefit from more discussion
* It's inconsistent with the CodeMirror editor
Would you mind perhaps starting another PR for edit template enhancements?