Fix bug with searchbox keyboard handler

This typo caused a bug where ESC did not leave the Vim INSERT mode.

lib/ace/ext/searchbox.js

@@ -177,7 +177,7 @@ var SearchBox = function(editor, range, showReplaceForm) {
 
     this.hide = function () {
         this.element.style.display = "none";
-        this.editor.keyBinding.removeKeyboardHandler(this.$searchKeybingin);
+        this.editor.keyBinding.removeKeyboardHandler(this.$closeSearchBarKb);
         this.editor.focus();
     };
     this.show = function(value, isReplace) {
@@ -255,4 +255,4 @@ exports.ISearch = function(session, options) {
 - includ all options that search has. ex: regex
 - searchbox.searchbox is not that pretty. we should have just searchbox
 - disable prev button if it makes sence
-*/
+*/