Prevent crash on load hardware ext without assets

src/components/connection-modal/connection-modal.jsx

@@ -44,7 +44,7 @@ const ConnectionModalComponent = props => (
 );
 
 ConnectionModalComponent.propTypes = {
-    connectingMessage: PropTypes.node,
+    connectingMessage: PropTypes.node.isRequired,
     connectionSmallIconURL: PropTypes.string,
     connectionTipIconURL: PropTypes.string,
     name: PropTypes.node,
@@ -55,6 +55,10 @@ ConnectionModalComponent.propTypes = {
     useAutoScan: PropTypes.bool.isRequired
 };
 
+ConnectionModalComponent.defaultProps = {
+    connectingMessage: 'Connecting'
+};
+
 export {
     ConnectionModalComponent as default,
     PHASES