MOBILE-4059 user: Add suffix to support form

scripts/langindex.json

@@ -2396,6 +2396,7 @@
   "core.user.sendemail": "local_moodlemobileapp",
   "core.user.student": "moodle/defaultcoursestudent",
   "core.user.support": "local_moodlemobileapp",
+  "core.user.supportsubject": "local_moodlemobileapp",
   "core.user.teacher": "moodle/noneditingteacher",
   "core.user.useraccount": "moodle",
   "core.user.userwithid": "local_moodlemobileapp",

src/core/features/user/lang.json

@@ -31,6 +31,7 @@
     "sendemail": "Email",
     "student": "Student",
     "support": "Contact site support",
+    "supportsubject": "[App] {{subject}}",
     "teacher": "Non-editing teacher",
     "userwithid": "User with ID {{id}}",
     "webpage": "Web page"

src/core/features/user/services/support.ts

@@ -90,6 +90,10 @@ export class CoreUserSupportService {
             return;
         }
 
+        if (subject) {
+            subject = Translate.instant('core.user.supportsubject', { subject });
+        }
+
         const unsubscribe = CoreSubscriptions.once(browser.on('loadstop'), () => {
             browser.executeScript({
                 code: `