Add info about RTL languages to Meteor WeKan. Not used in Meteor WeKan yet.

Thanks to xet7 !

Related #3376

imports/i18n/languages.js

@@ -4,42 +4,49 @@ export default {
     tag: "ar-DZ",
     name: "دزيرية",
     load: () => import('./data/ar-DZ.i18n.json'),
+    rtl: "true",
   },
   "ar-EG": {
     code: "ar",
     tag: "ar-EG",
     name: "مَصرى",
     load: () => import('./data/ar-EG.i18n.json'),
+    rtl: "true",
   },
   "ar": {
     code: "ar",
     tag: "ar",
     name: "العربية",
     load: () => import('./data/ar.i18n.json'),
+    rtl: "true",
   },
   "ary": {
     code: "ary",
     tag: "ary",
     name: "عربي مغربي",
     load: () => import('./data/ary.i18n.json'),
+    rtl: "true",
   },
   "az-AZ": {
     code: "az",
     tag: "az-AZ",
     name: "Azərbaycan (Azərbaycan)",
     load: () => import('./data/az-AZ.i18n.json'),
+    rtl: "true",
   },
   "az-LA": {
     code: "az",
     tag: "az-LA",
     name: "Azərbaycan (Latin)",
     load: () => import('./data/az-LA.i18n.json'),
+    rtl: "true",
   },
   "az": {
     code: "az",
     tag: "az",
     name: "Azərbaycan",
     load: () => import('./data/az.i18n.json'),
+    rtl: "true",
   },
   "bg": {
     code: "bg",
@@ -232,12 +239,14 @@ export default {
     tag: "fa-IR",
     name: "فارسی/پارسی (ایران\u200e)",
     load: () => import('./data/fa-IR.i18n.json'),
+    rtl: "true",
   },
   "fa": {
     code: "fa",
     tag: "fa",
     name: "فارسی",
     load: () => import('./data/fa.i18n.json'),
+    rtl: "true",
   },
   "fi": {
     code: "fi",
@@ -304,12 +313,14 @@ export default {
     tag: "he-IL",
     name: "עברית (ישראל)",
     load: () => import('./data/he-IL.i18n.json'),
+    rtl: "true",
   },
   "he": {
     code: "he",
     tag: "he",
     name: "עברית",
     load: () => import('./data/he.i18n.json'),
+    rtl: "true",
   },
   "hi-IN": {
     code: "hi",