Solved bug to select external editor url

https://github.com/okamstudio/godot/issues/145

tools/editor/plugins/script_editor_plugin.cpp

@@ -1507,7 +1507,7 @@ ScriptEditorPlugin::ScriptEditorPlugin(EditorNode *p_node) {
 
 	EDITOR_DEF("external_editor/use_external_editor",false);
 	EDITOR_DEF("external_editor/exec_path","");
-	EditorSettings::get_singleton()->add_property_hint(PropertyInfo(Variant::STRING,"external_editor/exec_path",PROPERTY_HINT_FILE));
+	EditorSettings::get_singleton()->add_property_hint(PropertyInfo(Variant::STRING,"external_editor/exec_path",PROPERTY_HINT_GLOBAL_FILE));
 	EDITOR_DEF("external_editor/exec_flags","");
 
 }