profile-settings: Change name-input class to a more specific id.

Changes `name-input` class, that was only being used in a div
wrapper for the input element for changing a user's full name,
to be a more specific id name: `full_name_input_container`.

This id is used to set or remove the disabled setting tooltip
when name changes are disabled by the organization.

There are no CSS rules set with this class/id.

static/js/tippyjs.js

@@ -399,7 +399,7 @@ export function initialize() {
     });
 
     delegate("body", {
-        target: [".name-input.name_changes_disabled_tooltip"],
+        target: ["#full_name_input_container.name_changes_disabled_tooltip"],
         content: $t({
             defaultMessage:
                 "Name changes are disabled in this organization. Contact an administrator to change your name.",