fixing tooltips

docs/FreeBedsChartView.js

@@ -86,7 +86,7 @@ class FreeBedsChartView {
                 },
                 tooltip: {
                     callbacks: {
-                        label: UIUtils.getLabelWithPercent
+                        label: UIUtils.getYLabelWithPercent
                     }
                 }
             },

docs/MedianOfFreeBedsByKreisChartView.js

@@ -51,7 +51,7 @@ class MedianOfFreeBedsByKreisChartView {
                 },
                 tooltip: {
                     callbacks: {
-                        label: UIUtils.getLabelWithPercent
+                        label: UIUtils.getXLabelWithPercent
                     }
                 }
             },

docs/UIUtils.js

@@ -17,14 +17,22 @@ class UIUtils {
         return selectElement.options[selectElement.selectedIndex];
     }
 
-    static getLabelWithPercent(context) {
+    static getYLabelWithPercent(context) {
+        return UIUtils._getLabelWithPercent(context, context.parsed.y);
+    }
+
+    static getXLabelWithPercent(context) {
+        return UIUtils._getLabelWithPercent(context, context.parsed.x);
+    }
+
+    static _getLabelWithPercent(context, value) {
         let label = context.dataset.label || '';
 
         if (label) {
             label += ': ';
         }
-        if (context.parsed.y !== null) {
+        if (value !== null) {
-            label += context.parsed.y.toFixed(1) + "%";
+            label += value.toFixed(1) + "%";
         }
         return label;
     }