fix(list): secondary button wasn't coping ngIf attribute

fixes #5297

Closes #5991

Author: EladBezalel

src/components/list/list.js

@@ -95,7 +95,7 @@ function mdListItemDirective($mdAria, $mdConstant, $mdUtil, $timeout) {
 
       tEl[0].setAttribute('role', 'listitem');
 
-      if (tAttrs.ngClick || tAttrs.ngHref || tAttrs.href || tAttrs.uiSref || tAttrs.ngAttrUiSref) {
+      if (tAttrs.ngIf || tAttrs.ngClick || tAttrs.ngHref || tAttrs.href || tAttrs.uiSref || tAttrs.ngAttrUiSref) {
         wrapIn('button');
       } else {
         for (var i = 0, type; type = proxiedTypes[i]; ++i) {
@@ -165,7 +165,7 @@ function mdListItemDirective($mdAria, $mdConstant, $mdUtil, $timeout) {
       }
 
       function copyAttributes(item, wrapper) {
-        var copiedAttrs = ['ng-click', 'aria-label', 'ng-disabled',
+        var copiedAttrs = ['ng-if', 'ng-click', 'aria-label', 'ng-disabled',
           'ui-sref', 'href', 'ng-href', 'ng-attr-ui-sref'];
         angular.forEach(copiedAttrs, function(attr) {
           if (item.hasAttribute(attr)) {