show # messages, use msgpack to compress json

interface/src/project/EMSESPDashboard.tsx

@@ -24,7 +24,10 @@ class EMSESP extends Component<RouteComponentProps> {
           onChange={(e, path) => this.handleTabChange(path)}
           variant="fullWidth"
         >
-          <Tab value={`/${PROJECT_PATH}/devices`} label="Devices & Sensors" />
+          <Tab
+            value={`/${PROJECT_PATH}/devices`}
+            label="Devices &amp; Sensors"
+          />
           <Tab value={`/${PROJECT_PATH}/status`} label="EMS Status" />
           <Tab value={`/${PROJECT_PATH}/help`} label="EMS-ESP Help" />
         </Tabs>

interface/src/project/EMSESPDevicesController.tsx

@@ -22,7 +22,7 @@ class EMSESPDevicesController extends Component<EMSESPDevicesControllerProps> {
 
   render() {
     return (
-      <SectionContent title="Devices & Sensors">
+      <SectionContent title="Devices &amp; Sensors">
         <RestFormLoader
           {...this.props}
           render={(formProps) => <EMSESPDevicesForm {...formProps} />}