refactor(datepicker): move popup document click bind

Moved the datepicker popup document click bind to
a timeout so having preventDefault and stopPropagation
on the element click event triggering the
popup to be open is no longer necessary.

Closes #3972
Fixes #3705

src/datepicker/datepicker.js

@@ -710,10 +710,9 @@ function ($compile, $parse, $document, $position, dateFilter, dateParser, datepi
           scope.position = appendToBody ? $position.offset(element) : $position.position(element);
           scope.position.top = scope.position.top + element.prop('offsetHeight');
 
-          $document.bind('click', documentClickBind);
-
           $timeout(function() {
             scope.$broadcast('datepicker.focus');
+            $document.bind('click', documentClickBind);
           }, 0, false);
         } else {
           $document.unbind('click', documentClickBind);

src/datepicker/docs/demo.js

@@ -19,9 +19,6 @@ angular.module('ui.bootstrap.demo').controller('DatepickerDemoCtrl', function ($
   $scope.toggleMin();
 
   $scope.open = function($event) {
-    $event.preventDefault();
-    $event.stopPropagation();
-
     $scope.opened = true;
   };
 

src/datepicker/test/datepicker.spec.js

@@ -1184,7 +1184,7 @@ describe('datepicker directive', function () {
   });
 
   describe('as popup', function () {
-    var inputEl, dropdownEl, $document, $sniffer;
+    var inputEl, dropdownEl, $document, $sniffer, $timeout;
 
     function assignElements(wrapElement) {
       inputEl = wrapElement.find('input');
@@ -1221,9 +1221,10 @@ describe('datepicker directive', function () {
     describe('initially opened', function () {
       var wrapElement;
 
-      beforeEach(inject(function(_$document_, _$sniffer_) {
+      beforeEach(inject(function(_$document_, _$sniffer_, _$timeout_) {
         $document = _$document_;
         $sniffer = _$sniffer_;
+        $timeout = _$timeout_;
         $rootScope.isopen = true;
         $rootScope.date = new Date('September 30, 2010 15:30:00');
         wrapElement = $compile('<div><input ng-model="date" datepicker-popup is-open="isopen"><div>')($rootScope);
@@ -1295,6 +1296,7 @@ describe('datepicker directive', function () {
       it('closes when click outside of calendar', function() {
         expect(dropdownEl.length).toBe(1);
 
+        $timeout.flush(0);
         $document.find('body').click();
         assignElements(wrapElement);
         expect(dropdownEl.length).toBe(0);