Revert "Revert inventory equipment/gear sorting due to inability to de/equip and maybe performance issues."

This reverts commit 9d50201180.

test/spec/controllers/sortableInventoryCtrlSpec.js

@@ -0,0 +1,42 @@
+describe('Sortable Inventory Controller', () => {
+  let scope;
+
+  beforeEach(inject(($rootScope, $controller) => {
+    scope = $rootScope.$new();
+    $controller('SortableInventoryController', {$scope: scope});
+  }));
+
+  it('defaults scope.order to name', () => {
+    expect(scope.order).to.eql('text()')
+  });
+
+  describe('#setOrder', () => {
+    it('sets sort criteria for all standard attributes', () =>{
+      let oldOrder = scope.order;
+
+      let attrs = [
+        'constitution',
+        'intelligence',
+        'perception',
+        'strength',
+        'name',
+        'set'
+      ];
+
+      attrs.forEach((attribute) => {
+        scope.setOrder(attribute);
+        expect(scope.order).to.exist;
+        expect(scope.order).to.not.eql(oldOrder);
+        oldOrder = scope.order;
+      });
+    });
+
+    it('does nothing when missing sort criteria', () =>{
+      scope.order = null;
+
+      scope.setOrder('foooo');
+
+      expect(scope.order).to.not.exist;
+    });
+  });
+});