Fetch SL data in a goroutine, but also make sure to not spam them

while the goroutine is running

src/statusscreen/SL.go

@@ -58,7 +58,8 @@ func (sl *SL) GetOutput() []string {
 
 	// Check if it's time to refresh yet
 	if sl.nextRefresh <= time.Now().Unix() {
-		sl.getData()
+		sl.nextRefresh += 10
+		go sl.getData()
 	}
 
 	for _, v := range sl.lastResponse.ResponseData.Metros {