<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <include layout="@layout/toolbar"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/github"
        android:text="@string/about_github"
        android:gravity="center"/>

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@android:id/list"/>

</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <include layout="@layout/toolbar"/>

    <Button
        style="?android:borderlessButtonStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/github"
        android:text="@string/about_github"
        android:background="?android:colorBackground"
        android:elevation="2dp"
        android:gravity="center"
        android:textColor="@color/red"/>

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@android:id/list"/>

</LinearLayout>
Change GH button to be borderless with an elevation
Change GH button to be borderless with an elevation
