Steps to reproduce the bug
In Themebuilder:
- enable Advanced edit and edit the Grid component.
- Once there, in Grid Construction Elements, go to the GRID DEFAULT part.
- In the top-right element tree area, go in <div> Grid ---> <table> Table.
- Once there, set the Table > Border Collapse property to Separate
- Finally try applying two different values for vertical and horizontal spacing in the Table > Border Spacing property. If necessary, apply a visible border to cells to better see the issue.
Expected behavior : The two different values should be persisted and applied.
Actual behavior : The behavior is strange and editing one value seem to overwrite the other.