Allow to access Settings after exceeding the 2000 limit [MAILPOET-950]

lib/Config/Menu.php

@@ -347,8 +347,6 @@ class Menu {
 
 
   function settings() {
-    if($this->subscribers_over_limit) return $this->displaySubscriberLimitExceededTemplate();
-
     $settings = Setting::getAll();
     $flags = $this->_getFlags();
 

views/premium.html

@@ -133,6 +133,13 @@
     </p>
     <br>
     <div style="width: 65%; margin: 0 auto;">
+      <p style="text-align: center"><%= __("Already a Premium customer? [link]Add your Key in the Settings page[/link].")
+        |replace({
+        '[link]': '<a href="' ~ admin_url('admin.php?page=mailpoet-settings#premium') ~ '">',
+        '[/link]': '</a>'
+        })
+        |raw
+      %></p>
       <p style="text-align: center"><%= __("Don't need to use our sending service? Not a problem; we understand. You can also [link]buy the Premium[/link] features separately. Prices start at $100 per year for 1 website, $249 for 4 sites and $499 for an unlimited number of sites.")
         |replace({
         '[link]': '<a target="_blank" href="https://account.mailpoet.com/premium?utm_source=plugin&utm_medium=premium&utm_campaign=buy-premium">',