Issue/cr 6793 preview tab enable the rtl mode when an rtl language is selected (#9681)

* update rtl
surveyjs/survey-creator#6793

* fix test
surveyjs/survey-creator#6793

---------

Co-authored-by: Aleksey Novikov <[email protected]>

Author: tsv2013

packages/survey-core/src/surveyStrings.ts

@@ -18,7 +18,7 @@ export var surveyLocalization = {
     this.localeNames[loc] = localeConfig.nativeName;
     this.localeNamesInEnglish[loc] = localeConfig.englishName;
     if (localeConfig.rtl !== undefined) {
-      this.localeDirections[loc] = localeConfig.rtl;
+      this.localeDirections[loc] = localeConfig.rtl ? "rtl" : "ltr";
     }
   },
   get currentLocale(): string {

tests/markup/etalon_survey.ts

@@ -1,4 +1,4 @@
-import { surveyLocalization } from "survey-core";
+import { setupLocale } from "survey-core";
 import { registerMarkupTests } from "./helper";
 
 registerMarkupTests(
@@ -64,8 +64,7 @@ registerMarkupTests(
       },
       event: "onAfterRenderSurvey",
       initSurvey: (survey) => {
-        surveyLocalization.locales["tst"] = {};
-        surveyLocalization.localeDirections["tst"] = "rtl";
+        setupLocale({ localeCode: "tst", strings: {}, nativeName: "Tst", englishName: "Test", rtl: true });
 
         survey.locale = "tst";
       },