ui: status: Label patch processing graph axes

This commit labels the axes with units, so it's more obvious what the
graph is trying to depict.

Also move the legend inside the graph to conserve valuable vertical
screen space.

status.js

@@ -60,26 +60,46 @@ function load_times(data, canva_id)
 	    datasets: [{
 		backgroundColor: "rgba(0, 0, 0, 0)",
 		pointBorderColor: "rgba(0, 64, 255, 0.7)",
-		label: 'Processing time by patch post time',
+		label: 'By patch post time',
 		data: e1.map(function(e){return e.v;})
 	    }, {
 		backgroundColor: "rgba(0, 0, 0, 0)",
 		pointBorderColor: "rgba(255, 64, 0, 0.7)",
-		label: 'Processing time by check delivery time',
+		label: 'By check delivery time',
 		data: e2.map(function(e){return e.v;})
 	    }]
 	},
 	options: {
+	    plugins: {
+                title: {
+                    display: true,
+                    text: 'Patch processing times over last 7 days',
+                    padding: 0
+                },
+		legend: {
+		    position: 'chartArea',
+		},
+	    },
 	    scales: {
 		y: {
 		    type: 'linear',
+		    title: {
+		        display: true,
+		        text: 'Hours',
+		        padding: 0
+                    },
 		    ticks: {
 		        stepSize: 3
 		    },
 		    beginAtZero: true
 		},
 		x: {
 		    type: 'linear',
+		    title: {
+		        display: true,
+		        text: 'Hours ago',
+		        padding: 0
+                    },
 		    ticks: {
 		        stepSize: 24
 		    },