4001 - Datatable use Datagrid - Editable borders corrections #4230
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Fixing cell border rendering when adjacent cells are non-editable:
approach.2.mp4
The first approach which is consistent with how the borders are currently done (top,left for each cell) doesn't quite work. Since some cells span multiple columns, setting the border top for those can show and editable border section where it shouldn't be:
approach.1.mp4
Also, because some cells have a non-transparent background color, the outline of the focused editable cell is hidden. Fixing that with z-index wasn't possible because the sticky headers should always have a higher z-index.
Due to that, the best approach was to have some double borders, which doesn't create those issues and helps distinguish more clearly editable vs readonly cells.