Network map styling improvements (Koenkk#1653)

* Weight and style lines based on routes

* Refactor to make End Device case more obvious

lib/extension/networkMap.js

@@ -111,10 +111,12 @@ class NetworkMap {
              * due to not responded to the lqi scan. In that case we do not add an edge for this device.
              */
             topology.filter((e) => (e.ieeeAddr === device.ieeeAddr) || (e.nwkAddr === device.nwkAddr)).forEach((e) => {
-                const lineStyle = (e.lqi==0) ? `style="dashed", ` : ``;
+                const lineStyle = (device.type=='EndDevice') ? 'style="dashed", '
+                    : (!e.routes.length) ? 'style="dotted", ' : '';
+                const lineWeight = (!e.routes.length) ? 'weight=0, ' : '';
                 const textRoutes = e.routes.map((r) => `0x${r.toString(16)}`);
-                const lineLabels = e.lqi + '\\n[' + textRoutes.join(']\\n[') + ']';
-                text += `  "${e.parent}" -> "${device.ieeeAddr}" [`+lineStyle+`label="${lineLabels}"]\n`;
+                const lineLabels = `label="${e.lqi}\\n[${textRoutes.join(']\\n[')}]"`;
+                text += `  "${e.parent}" -> "${device.ieeeAddr}" [${lineStyle}${lineWeight}${lineLabels}]\n`;
             });
         });