fix(toolbar): fixed the toolbar spacing for iOS with platform-cordova

Added some tests for modals with a toolbar, only target the first
toolbar in a menu or modal so the user can have multiple toolbars
without skewing them. References #469

ionic/components/modal/test/basic/main.html

@@ -6,6 +6,9 @@
   <p>
     <button (click)="openModal()">Open plain modal</button>
   </p>
+  <p>
+    <button class="e2eOpenToolbarModal" (click)="openToolbarModal()">Open modal w/ toolbar</button>
+  </p>
   <p>
     <button (click)="openModalCustomAnimation()">Modal: Custom Animation</button>
   </p>