Update in-app update checking

app/src/main/res/layout/fragment_tools.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.core.widget.NestedScrollView
 	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent">
 
@@ -14,7 +15,9 @@
 			layout="@layout/layout_app_update"
 			android:layout_width="match_parent"
 			android:layout_height="wrap_content"
-			android:layout_margin="@dimen/margin_normal" />
+			android:layout_margin="@dimen/margin_normal"
+			android:visibility="gone"
+			tools:visibility="visible" />
 
 		<include
 			android:id="@+id/layout_sync"