Fix #11607 Unable to change password from Login information tab - make the error message more explicit

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>

ChangeLog

@@ -7,6 +7,7 @@ phpMyAdmin - ChangeLog
 - issue #11590 Parser: Array to string conversion
 - issue #11597 Huge binary log growth on 4.5.x
 - issue #11594 'only_db' config option bug when db names contain underscore and are grouped
+- issue #11607 Unable to change password from Login information tab
 
 4.5.1.0 (2015-10-23)
 - issue        Invalid argument supplied for foreach()

server_privileges.php

@@ -137,7 +137,13 @@ if (isset($_REQUEST['change_copy']) && $username == $_REQUEST['old_username']
     && $hostname == $_REQUEST['old_hostname']
 ) {
     $response->addHTML(
-        PMA_Message::error(__('Username and hostname didn\'t change.'))->getDisplay()
+        PMA_Message::error(
+            __(
+                "Username and hostname didn't change. "
+                . "If you only want to change the password, "
+                . "'Change password' tab should be used."
+            )
+        )->getDisplay()
     );
     $response->isSuccess(false);
     exit;