Fix tvOS controls overlay buttons

tvOS/ControlsOverlayButton.swift

@@ -0,0 +1,28 @@
+import SwiftUI
+
+struct ControlsOverlayButton<LabelView: View>: View {
+    var focusedField: FocusState<ControlsOverlay.Field?>.Binding
+    var field: ControlsOverlay.Field
+    let label: LabelView
+
+    init(
+        focusedField: FocusState<ControlsOverlay.Field?>.Binding,
+        field: ControlsOverlay.Field,
+        @ViewBuilder label: @escaping () -> LabelView
+    ) {
+        self.focusedField = focusedField
+        self.field = field
+        self.label = label()
+    }
+
+    var body: some View {
+        label
+            .padding()
+            .frame(width: 400)
+            .focusable()
+            .focused(focusedField, equals: field)
+            .background(focusedField.wrappedValue == field ? Color.white : Color.secondary)
+            .foregroundColor(focusedField.wrappedValue == field ? Color.black : Color.white)
+            .clipShape(RoundedRectangle(cornerRadius: 4))
+    }
+}