[ticket/11928] Make sure the indicator is on top of other elements.

PHPBB3-11928

phpBB/adm/style/admin.css

@@ -1605,6 +1605,7 @@ input.button1:focus, input.button2:focus, input.button3:focus {
 	position: fixed;
 	left: 50%;
 	top: 50%;
+	z-index: 51;
 }
 
 /* Pagination

phpBB/styles/prosilver/theme/common.css

@@ -833,6 +833,7 @@ li.pagination ul {
 	position: fixed;
 	left: 50%;
 	top: 50%;
+	z-index: 51;
 }
 
 /* Miscellaneous styles