Added invalidate cache button (through a generic APIButton widget)

monitor/service.go

@@ -52,6 +52,11 @@ func (s *Service) LoadScripts() error {
 	return nil
 }
 
+func (s *Service) InvalidateCache() {
+	log.Printf("Invalidating monitor cache")
+	s.scriptOutputCache = map[string]cacheEntry{}
+}
+
 func (s *Service) GetOutput(command string) (string, error) {
 	// check if output is present in cache
 	if entry, found := s.scriptOutputCache[command]; found {