FS-7509: exit full screen on hangup

html5/verto/video_demo/verto.js

@@ -505,6 +505,7 @@ $(".dtmf").click(function(e) {
 });
 
 $("#hupbtn").click(function() {
+    exit_full_screen();
     verto.hangup();
     cur_call = null;
 });
@@ -558,17 +559,21 @@ $(document).on('webkitfullscreenchange mozfullscreenchange fullscreenchange MSFu
 	       });
 
 
-$("#fullbtn").click(function() {
-
-    if (!is_full) {
-	full_screen("fs");
-    } else {
+function exit_full_screen()
+{
     if (document.webkitFullscreenEnabled) {
 	document.webkitExitFullscreen();
     } else if (document.mozFullScreenEnabled) {
 	document.mozExitFullScreen();
     }
+}
+
+$("#fullbtn").click(function() {
 
+    if (!is_full) {
+	full_screen("fs");
+    } else {
+	exit_full_screen();
     }