Node hints should be recursive (both expressions and flags)

Some node hints are only set on supertype (e.g. Item) but are generally queried from  nodes of subtype (e.g. Rectangle). An example is "visibleNonDefaultProperties" which is set on Item but generally is queried from nodes of Item subtypes.

All node hints (both expressions and flags) should be recursive so that if current type doesn't set the flag, it is checked from the parent types until some type sets it.

Non-PS builds handled this crudely in NodeHints::NodeHints(const ModelNode &node) constructor by recursing the class hierarchy until some type specified any hints and used those.

For more robust functionality, each individual hint/flag should be recursed separately. And for efficiency this should be done in project storage once instead of repeating it every time NodeHints is constructed.