Pattern Overrides: Add a way to reset any overrides #57751
Description
What problem does this address?
Part of #53705
A user can add override content in a pattern that supports overrides, but at the moment there's no way to reset those overrides to the value originally in the pattern.
Furthermore, it was noted in the tracking issue that there's a bug in the way empty override values are lost:
If you delete the content from a paragraph with editable attrib, it looks empty, which is what user may want, but saving and reloading brings back content from the original pattern, which in other cases may also be what user wants :thinking_face:
It seems like even empty override values should be retained
What is your proposed solution?
Add a way to reset/clear any pattern overrides to the pattern block.
The option is:
- only be visible when the pattern supports overrides
- only be enabled when there are override values
- clicking it clears all the override values in a pattern, this should hopefully be a fairly simple task of unsetting the attribute that contains the overrides.
A follow-up to this could be to explore per-content block reset of overrides, but this is a lower priority right now.