Fix key list item selection

Author: comp500

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

@@ -1,8 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="wrap_content"
+    android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:orientation="horizontal">
+    android:orientation="horizontal"
+    android:background="?android:attr/selectableItemBackground">
 
     <TextView
         android:id="@+id/file_name"