Address review feedback: drop dead rowScrubPreview reset, fix stale keyDown comment

Author: superhighfives

Pika/Views/EditableColorValue.swift

@@ -498,7 +498,6 @@ struct EditableColorValue: View {
         isInvalid = false
         preEditColor = nil
         sessionOwner = nil
-        rowScrubPreview = nil
         // Only clear the own-write marker when we're about to resync anyway. A `resync: false`
         // commit (see `finishEditing`'s success path) deliberately keeps `values` as typed rather
         // than the freshly (and possibly lossily) decomposed colour — clearing this unconditionally

Pika/Views/ScrubTextField.swift

@@ -422,7 +422,8 @@ final class ScrubTextField: NSTextField {
             switch next.type {
             case .keyDown:
                 // Escape abandons the scrub. Only meaningful once a drag is actually under way;
-                // otherwise let the key fall through to its normal handling.
+                // otherwise the key is dropped rather than dispatched (narrow window: only
+                // while the mouse button is held on this field).
                 guard didBeginDrag, next.keyCode == 53 else { continue }
                 cancelDrag()
                 return