Remove system tags from sidebar tags listing

core/ui/MoreSideBar/Tags.tid

@@ -5,7 +5,7 @@ caption: {{$:/language/SideBar/Tags/Caption}}
 \define lingo-base() $:/language/SideBar/Tags/
 <$button to="$:/TagManager"><<lingo TagManager/Caption>></$button>
 
-<$list filter="[tags[]sort[title]]">
+<$list filter="[tags[]!is[system]sort[title]]">
 
 <$transclude tiddler="$:/core/ui/TagTemplate"/> <small class="tw-menu-list-count"><$count filter="[is[current]tagging[]]"/></small>