Indicate item share is less than 0.1%

Signed-off-by: Christian König <ckoenig@posteo.de>

scripts/pi-hole/js/index.js

@@ -729,17 +729,21 @@ function doughnutTooltip(tooltipLabel) {
   // to compensate rounding errors we round to two one decimal
 
   var label = " " + tooltipLabel.label;
+  // in case the item share is really small it could be rounded to 0.0
+  // we compensate for this
+  var itemPercentage =
+    tooltipLabel.parsed.toFixed(1) === 0 ? "< 0.1" : tooltipLabel.parsed.toFixed(1);
 
   // even if no doughnut slice is hidden, sometimes percentageTotalShown is slightly less then 100
   // we therefore use 99.9 to decide if slices are hidden (we only show with 0.1 precision)
   if (percentageTotalShown > 99.9) {
     // All items shown
-    return label + ": " + tooltipLabel.parsed.toFixed(1) + "%";
+    return label + ": " + itemPercentage + "%";
   } else {
     return (
       label +
       ":<br>&bull; " +
-      tooltipLabel.parsed.toFixed(1) +
+      itemPercentage +
       "% of all queries<br>&bull; " +
       ((tooltipLabel.parsed * 100) / percentageTotalShown).toFixed(1) +
       "% of shown items"