& Changing "Edit message icon" string to "Message Icons" which looks better in new admin theme.

Themes/default/languages/Admin.english.php

@@ -680,7 +680,7 @@ $txt['smiley_sets'] = 'Smiley Sets';
 $txt['smileys_add'] = 'Add Smiley';
 $txt['smileys_edit'] = 'Edit Smileys';
 $txt['smileys_set_order'] = 'Set Smiley order';
-$txt['icons_edit_message_icons'] = 'Edit message icons';
+$txt['icons_edit_message_icons'] = 'Message Icons';
 
 $txt['membergroups_new_group'] = 'Add Membergroup';
 $txt['membergroups_edit_groups'] = 'Edit Membergroups';