[BUGFIX] Fullscreen icon switch

lib/utils/helper.js

@@ -184,6 +184,7 @@ define({
         || fel.webkitRequestFullScreen
         || fel.mozRequestFullScreen;
       func.call(fel);
+      btn.classList.remove('ion-full-enter');
       btn.classList.add('ion-full-exit');
     } else {
       func = document.exitFullscreen
@@ -191,6 +192,7 @@ define({
         || document.mozCancelFullScreen;
       if (func) {
         func.call(document);
+        btn.classList.remove('ion-full-exit');
         btn.classList.add('ion-full-enter');
       }
     }