Revamped Challenge Buttons completely, Added primal abilities, items and primals themselves

client/app/js/views/battles/battle_view.coffee

@@ -118,11 +118,11 @@ class @BattleView extends Backbone.View
     $actions.html @action_template(locals)
 
     pokemon = @model.getPokemon(@model.get('index'), 0)
-    if pokemon.getItem()?.type == 'megastone'
-      $button = $actions.find('.mega-evolve')
+    $button = $actions.find('.mega-evolve')
+    if pokemon.canMegaEvolve()
       $button.removeClass("hidden")
-      if !pokemon.canMegaEvolve()
-        $button.addClass('disabled')
+    else
+      $button.addClass('disabled')
 
     $actions.find('.move.button').each (i, el) =>
       $this = $(el)