fix(grids) Show Controls And Update Grids With Generated Content (#6553)

- Simplified `isGridCell`.
- Implemented `findOriginalGrid` utility function.
- Added update to `layoutSystemForChildrenInherited` to
`fillLayoutSystemForChildrenFromAncestors`.
- `useGridData` now uses `findOriginalGrid` to look up the hierarchy to
find the grid we're interested in.
- `resizeGridStrategy` now uses `findOriginalGrid` to find the correct
element to update.
- DOM walker defaults `layoutSystemForChildrenInherited` to false.

editor/src/components/canvas/__snapshots__/ui-jsx-canvas-bugs.spec.tsx.snap

@@ -223,6 +223,7 @@ Object {
       "justifyContent": null,
       "justifySelf": null,
       "layoutSystemForChildren": null,
+      "layoutSystemForChildrenInherited": false,
       "margin": Object {},
       "naturalHeight": null,
       "naturalWidth": null,
@@ -373,6 +374,7 @@ Object {
       "justifyContent": null,
       "justifySelf": null,
       "layoutSystemForChildren": null,
+      "layoutSystemForChildrenInherited": false,
       "margin": Object {},
       "naturalHeight": null,
       "naturalWidth": null,