fix sync-doc

* fix #2493
* save() now takes optional column count, which defaults to highest saved layout otherwise (so we can correctly return back to 12 column when saving in lower res)
* nested grid ALWAYS save to the saved parent container to match
* also changed Utils.removeInternalForSave() to NOT removed w/h=1 optimization as it was causing issues in my app (widget defaults > 1)

save() now takes optional column count

v12.3.1

* more fix #2493
* engine save tweaks to hsow it gets column count (uses actual subgrid column and don't use _layouts if same as current)
* also reverted back to not save w/h:1 as people already workaround this if they need to and much less data by default.

tweaks on save() takking column option

* migrated testing to modern tools
* yarn lint --fix as well (spaces)

* since we don't know how to hydrate arrays (unlike object spread operator '...') skip them)

fix Util:removeInternalForSave() to skip arrays