Add code to flot that plots any datapoints which to not have neighbors

as 0.5 radius points
 - fixes https://github.com/grafana/grafana/issues/13605

public/vendor/flot/jquery.flot.js

@@ -2271,9 +2271,51 @@ Licensed under the MIT license.
             });
         }
 
+        function drawOrphanedPoints(series) {
+            /* Filters series data for points with no neighbors before or after
+             * and plots single 0.5 radius points for them so that they are displayed.  
+             */
+            var abandonedPoints = [];
+            var beforeX = null;
+            var afterX = null;
+            var datapoints = series.datapoints;
+            // find any points with no neighbors before or after
+            var emptyPoints = [];
+            for (var j = 0; j < datapoints.pointsize - 2; j++) {
+                emptyPoints.push(0);
+            }
+            for (var i = 0; i < datapoints.points.length; i += datapoints.pointsize) {
+                var x = datapoints.points[i], y = datapoints.points[i + 1];
+                if (i === datapoints.points.length - datapoints.pointsize) {
+                    afterX = null;
+                } else {
+                    afterX = datapoints.points[i + datapoints.pointsize];
+                }
+                if (x !== null && y !== null && beforeX === null && afterX === null) {
+                    abandonedPoints.push(x);
+                    abandonedPoints.push(y);
+                    abandonedPoints.push.apply(abandonedPoints, emptyPoints);
+                }
+                beforeX = x;
+
+            }
+            var olddatapoints = datapoints.points
+            datapoints.points = abandonedPoints;
+ 
+            series.points.radius = series.lines.lineWidth/2;
+            // plot the orphan points with a radius of lineWidth/2
+            drawSeriesPoints(series);
+            // reset old info
+            datapoints.points = olddatapoints;
+        }
+
         function drawSeries(series) {
             if (series.lines.show)
                 drawSeriesLines(series);
+                if (!series.points.show && !series.bars.show) {
+                    // not necessary if user wants points displayed for everything
+                    drawOrphanedPoints(series);
+                }
             if (series.bars.show)
                 drawSeriesBars(series);
             if (series.points.show)