Fixed extend order and moved toXlsvValue to Mixin both extends from

Author: JockeCK

cosmoz-omnitable-column-list-horizontal.html

@@ -53,8 +53,8 @@
 		/**
 		 * @polymer
 		 * @customElement
-		 * @appliesMixin Cosmoz.OmnitableColumnMixin
 		 * @appliesMixin Cosmoz.ListColumnMixin
+		 * @appliesMixin Cosmoz.OmnitableColumnMixin
 		 */
 		class OmnitableColumnListHorizontal extends	Cosmoz.ListColumnMixin(Cosmoz.OmnitableColumnMixin(
 			Polymer.mixinBehaviors([Cosmoz.TranslatableBehavior], Polymer.Element)
@@ -144,10 +144,6 @@
 			_getDefaultFilter() {
 				return [];
 			}
-
-			toXlsxValue(item, valuePath = this.valuePath) {
-				return this.getString(item, valuePath);
-			}
 		}
 
 		customElements.define(

cosmoz-omnitable-column-list-mixin.html

@@ -36,5 +36,10 @@
 				.filter(Boolean)
 				.join(', ');
 		}
+
+		toXlsxValue(item, valuePath = this.valuePath) {
+			return this.getString(item, valuePath);
+		}
+
 	});
 </script>

cosmoz-omnitable-column-list.html

@@ -37,11 +37,11 @@
 		/**
 		 * @polymer
 		 * @customElement
-		 * @appliesMixin Cosmoz.OmnitableColumnMixin
 		 * @appliesMixin Cosmoz.ListColumnMixin
+		 * @appliesMixin Cosmoz.OmnitableColumnMixin
 		 */
 		class OmnitableColumnList extends
-			Cosmoz.OmnitableColumnMixin(Cosmoz.ListColumnMixin(
+			Cosmoz.ListColumnMixin(Cosmoz.OmnitableColumnMixin(
 				Polymer.mixinBehaviors(
 					[Cosmoz.TranslatableBehavior],
 					Polymer.Element