2 changes, first fixed the bug where auras were causing the cards to slide to the right, auras always have targets, so i added a conditional to guiplay to ignore adding it to the horizontal shift as these auras should never be just laying in the battlefield with no target.

2nd, started laying some ground work for planeswalkers.
added the planeswalker rule, as per mtg rules, if you have a type=planeswalker subtype=jace already on the battlefield, both are sent to the graveyard. so you can not have a jace mind scuptor and a jace beleren out at the same time. i choose to use subtype= and type= rather then adding another variable to MTGCard...
also, added GuiPlay positioning for planeswalker,
i think theres been a HUGE misunderstanding about planeswalkers which has most going "battlefield is too crowded where would be put them...easy...slap them at the end of the lands ..done...theyre not creatures or artifacts/enchantments..so i moved them to the colum with the lands and have guiplay slap them at the end of that colum...btw this is in no means final...if someone can think of a better solution be my guest, but looking at the planeswalker (workaround) thread, its pretty obvious that no one will care where we slap the planeswalkers, as long as theyre supported. planeswalkers have alot more ground to cover...

projects/mtg/src/DuelLayers.cpp

@@ -32,6 +32,7 @@ void DuelLayers::init()
     action->Add(NEW MTGBlockRule(-1));
     action->Add(NEW MTGCombatTriggersRule(-1));
     action->Add(NEW MTGLegendRule(-1));
+    action->Add(NEW MTGPlaneWalkerRule(-1));
     action->Add(NEW MTGTokensCleanup(-1)); // needs to be before persist
     action->Add(NEW MTGPersistRule(-1));
     action->Add(NEW MTGAffinityRule(-1));