Added theme to configuration page

main.go

@@ -148,6 +148,7 @@ func main() { // {{{
 	service.Register("/trigger/delete/{id}", false, false, actionTriggerDelete)
 
 	service.Register("/configuration", false, false, pageConfiguration)
+	service.Register("/configuration/theme", false, false, actionConfigurationTheme)
 	service.Register("/entry/{datapoint}", false, false, actionEntryDatapoint)
 
 	go nodataLoop()
@@ -955,3 +956,14 @@ func pageConfiguration(w http.ResponseWriter, _ *http.Request, _ *session.T) { /
 
 	page.Render(w)
 } // }}}
+func actionConfigurationTheme(w http.ResponseWriter, r *http.Request, _ *session.T) { // {{{
+	theme := r.FormValue("theme")
+	err := smonConfig.SetTheme(theme)
+	if err != nil {
+		httpError(w, werr.Wrap(err).Log())
+		return
+	}
+
+	w.Header().Add("Location", "/configuration")
+	w.WriteHeader(302)
+} // }}}