[DE mobile] License check. Fixed open/save TXT. Undo/redo warning on co-authtoring.

apps/documenteditor/mobile/app/controller/Settings.js

@@ -249,6 +249,7 @@ define([
 
                 if (format) {
                     if (format == Asc.c_oAscFileType.TXT) {
+                        _.delay(function () {
                             uiApp.confirm(
                                 me.warnDownloadAs,
                                 me.notcriticalErrorTitle,
@@ -256,6 +257,7 @@ define([
                                     me.api.asc_DownloadAs(format);
                                 }
                             );
+                        }, 300);
                     } else {
                         me.api.asc_DownloadAs(format);
                     }