fix(modal): remove window class after animation

- Wait until animations are complete before removing window class

BREAKING CHANGE: This introduces a minor behavior change in when the class is removed

Closes #6056
Fixes #6051

src/modal/modal.js

@@ -375,16 +375,17 @@ angular.module('ui.bootstrap.modal', ['ui.bootstrap.stackedMap', 'ui.bootstrap.p
           afterAnimating.done = true;
 
           $animate.leave(domEl).then(function() {
+            if (done) {
+              done();
+            }
+
             domEl.remove();
             if (closedDeferred) {
               closedDeferred.resolve();
             }
           });
 
           scope.$destroy();
-          if (done) {
-            done();
-          }
         }
       }
 

src/modal/test/modal.spec.js

@@ -1390,15 +1390,21 @@ describe('$uibModal', function() {
         expect(body).not.toHaveClass('modal-open');
       });
 
-      it('should remove the custom class on closing of modal', function() {
+      it('should remove the custom class on closing of modal after animations have completed', function() {
         var modal = open({
           template: '<div>dummy modal</div>',
           openedClass: 'foo'
         });
 
         expect(body).toHaveClass('foo');
 
-        close(modal);
+        close(modal, null, true);
+        expect(body).toHaveClass('foo');
+
+        $animate.flush();
+        $rootScope.$digest();
+        $animate.flush();
+        $rootScope.$digest();
 
         expect(body).not.toHaveClass('foo');
       });