TObjectExpression support for complex expressions

[davidberneda]

TObjectExpression currently supports Object + field or property ( Edit1, 'Text' )

The enhancement is to support free expressions like:

'Button1.Width * 42 + (Panel1.Position.X / 3)'

A possible syntax:
var E : TExpression;
E:= TObjectExpression.From(Self, ' ......the expression...');
Caption:= E.Value;

The "Self" parameter is the "root" starting object, collection or component where to look for references in the expression (in this example, the Form owner of Button1 and Panel1)