Don't let error message popups cover the login form (#1488500)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Don't let error message popups cover the login form (#1488500)
 - Don't show errors when moving contacts into groups they are already in (#1488493)
 - Make folders with unread messages in subfolders bold again (#1486793)
 - Abbreviate long attachment file names with ellipsis (#1488499)

skins/larry/ui.js

@@ -262,6 +262,7 @@ function rcube_mail_ui()
       }
 
       var pos = $(p.object).offset();
+      pos.top -= (rcmail.env.task == 'login' ? 20 : 160);
       me.messagedialog.dialog('close');
       me.messagedialog.html(p.message)
         .dialog({
@@ -272,7 +273,7 @@ function rcube_mail_ui()
           close: function() {
             me.messagedialog.dialog('destroy').hide();
           },
-          position: ['center', pos.top - 160],
+          position: ['center', pos.top],
           hide: { effect:'drop', direction:'down' },
           width: 420,
           minHeight: 90