Datagrid2 Form view slow down.

[Monte Goulding]

> The following must not be set on the group for it to work as a container or scrolling layermode:
> 
> - opaque 
> - showBorder 
> - showname 
> - hScrollbar
> - vScrollbar 
> - dropShadow
> - innerShadow
> - outerGlow
> - innerGlow
> - colorOverlay
> 
> Yes these should be listed in the docs for layerMode instead of just `(no borders, no scrollbars)`. If someone would like to create a docs bug report about that and even better submit a patch that would he helpful for everyone I think.

FWIW I think it would also be pretty handy to have an indicator on the property inspector about whether there’s an issue with these properties in the object hierarchy.  It wouldn’t be that complicated, just recurse through the owner groups and check these properties.

Cheers

Monte