settings-modal: Only update display if overlay loaded in DOM.

If the personal / organization settings overlay has not been
loaded to the DOM in the user's session, then there's no need
to update the overlay display for changes to the user's
permissions to update their name, email or avatar.

So we check for the relevant element ids before updating the
overlay display when the user's role or these organization
settings change, and return early if they are not present in
the DOM.

frontend_tests/node_tests/settings_org.js

@@ -720,6 +720,8 @@ test("test get_sorted_options_list", () => {
 
 test("misc", ({override_rewire}) => {
     page_params.is_admin = false;
+    $("#user-avatar-upload-widget").length = 1;
+    $("#user_details_section").length = 1;
 
     const $stub_notification_disable_parent = $.create("<stub notification_disable parent");
     $stub_notification_disable_parent.set_find_results(

static/js/settings_account.js

@@ -51,6 +51,10 @@ export function update_full_name(new_full_name) {
 }
 
 export function update_name_change_display() {
+    if ($("#user_details_section").length === 0) {
+        return;
+    }
+
     if (!settings_data.user_can_change_name()) {
         $("#full_name").prop("disabled", true);
         $(".change_name_tooltip").show();
@@ -61,6 +65,10 @@ export function update_name_change_display() {
 }
 
 export function update_email_change_display() {
+    if ($("#user_details_section").length === 0) {
+        return;
+    }
+
     if (!settings_data.user_can_change_email()) {
         $("#change_email_button").prop("disabled", true);
         $("#change_email_button_container").addClass("email_changes_disabled_tooltip");
@@ -116,6 +124,10 @@ function upload_avatar($file_input) {
 }
 
 export function update_avatar_change_display() {
+    if ($("#user-avatar-upload-widget").length === 0) {
+        return;
+    }
+
     if (!settings_data.user_can_change_avatar()) {
         $("#user-avatar-upload-widget .image_upload_button").addClass("hide");
         $("#user-avatar-upload-widget .image-disabled").removeClass("hide");
@@ -130,6 +142,10 @@ export function update_avatar_change_display() {
 }
 
 export function update_account_settings_display() {
+    if ($("#user_details_section").length === 0) {
+        return;
+    }
+
     update_name_change_display();
     update_email_change_display();
     update_avatar_change_display();