fix($ionicModal): do not inherit has-header etc from parent scope

Closes #1191

js/angular/service/modal.js

@@ -181,6 +181,15 @@ function($rootScope, $document, $compile, $timeout, $ionicPlatform, $ionicTempla
     // Create a new scope for the modal
     var scope = options.scope && options.scope.$new() || $rootScope.$new(true);
 
+    angular.extend(scope, {
+      $hasHeader: false,
+      $hasSubheader: false,
+      $hasFooter: false,
+      $hasSubfooter: false,
+      $hasTabs: false,
+      $hasTabsTop: false
+    });
+
     // Compile the template
     var element = $compile('<ion-modal>' + templateString + '</ion-modal>')(scope);