[TIMOB-9181] Ti API: UI composite specification update

Related to TIMOB-8121, when parent view has dimension value set to SIZE and child view has FILL, the way that views will size themselves is undefined/unspecified. It seems that all platforms have some behavior defined. Because of that, this case should be specified so that all platform implement same behavior. Currently, Mobile web in that situation looks for parent view that has dimension defined and size itself according to the size of that parent (it FILLs parent). IMHO, more intuitive behavior would be if parent would SIZE itself according to child size (if there is a child with fixed dimension value). For example: Window ParentView (SIZE) ChildView (FILL) View (50px) My suggestion is that ParentView should have 50px (and ChildView also), while Mobile web solution would size ChildView to size of Window (and ParentView also). It seems to me that parent elements should have priority in cases like this.

var Window = Ti.UI.createWindow({ fullscreen: true, backgroundColor: 'white'});
 
var ParentView = Ti.UI.createView({backgroundColor:'red',layout:'horizontal', width: Ti.UI.SIZE, height:300})
 
var ChildView =Ti.UI.createView({backgroundColor:'green',layout:'horizontal', height:200, width: Ti.UI.FILL });
var View =Ti.UI.createView({backgroundColor:'blue',height:120, width:50 });
var View2 =Ti.UI.createView({backgroundColor:'yellow',height:120, width:50 });

ChildView.add(View);
ChildView.add(View2);
ParentView.add(ChildView);
Window.add(ParentView);
Window.open();