It seems that when you have a group using StackLayout(0,Horizontal,true), that Auto alignment for hidden items does work in general, but not for the very first item.
Attached a screenshot with a gap on the first item, which does have conditional visibility, as well as the skin definition for it (using streamed-MP, default listview, Moving-Pictures)
This is related to the following (fixed) bug:
0003241: Auto placing of controls in grouped StackLayout - MediaPortal Bugtracker
MediaPortal Version: 1.2.2
MediaPortal Skin: StreeamedMP
Windows Version: 7 x64 SP1
Attached a screenshot with a gap on the first item, which does have conditional visibility, as well as the skin definition for it (using streamed-MP, default listview, Moving-Pictures)
This is related to the following (fixed) bug:
0003241: Auto placing of controls in grouped StackLayout - MediaPortal Bugtracker
MediaPortal Version: 1.2.2
MediaPortal Skin: StreeamedMP
Windows Version: 7 x64 SP1