<!-- `RelativeLayout` is used instead of a `LinearLayout` because `supportAppBar` does not let `android:layout_weight="1"` cause `urlTextBox` to fill all the available space. -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
<!-- `RelativeLayout` is used instead of a `LinearLayout` because `supportAppBar` does not let `android:layout_weight="1"` cause `urlTextBox` to fill all the available space. -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_centerVertical="true"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_centerVertical="true"