themes/freifunk-generic: properly pass redirect url to uci changes menu

themes/freifunk-generic/luasrc/view/themes/freifunk-generic/header.htm

@@ -208,7 +208,7 @@ if tree.nodes[category] and tree.nodes[category].ucidata then
 
 <div id="savemenu">
 	<% if ucic > 0 then %>
-		<a class="warning" href="<%=controller%>/<%=category%>/uci/changes/?redir=<%=luci.http.urlencode(tree.nodes[category].nodes["uci"].query)%>"><%:Unsaved Changes%>: <%=ucic%></a>
+		<a class="warning" href="<%=controller%>/<%=category%>/uci/changes/?redir=<%=luci.http.urlencode(luci.http.formvalue("redir") or REQUEST_URI)%>"><%:Unsaved Changes%>: <%=ucic%></a>
 	<% end -%>
 </div><% end %>