fix on cm (connectin not closed somehow) and refactor isEnterKey

src/ui/index.tis

@@ -665,9 +665,7 @@ event keydown (evt) {
         return;
     }
     if (!evt.shortcutKey) {
-        if (evt.keyCode == Event.VK_ENTER ||
-            (is_osx && evt.keyCode == 0x4C) ||
-            (is_linux && evt.keyCode == 65421)) {
+        if (isEnterKey(evt)) {
             var el = $(button#connect);
             view.focus = el;
             el.sendEvent("click");