Looks like there are two settings for navbar
diff --git a/NavBar/res/values/config.xml b/NavBar/res/values/config.xml
index bdcac0d..0debbcd 100644
--- a/NavBar/res/values/config.xml
+++ b/NavBar/res/values/config.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 	<bool name="config_showNavigationBar">true</bool>
+	<bool name="config_supportSystemNavigationKeys">true</bool>
 </resources>