Make Widget flags private, expose via methods.

firmware/application/recent_entries.hpp

@@ -129,7 +129,7 @@ public:
 		Entries& recent
 	) : recent { recent }
 	{
-		flags.focusable = true;
+		set_focusable(true);
 	}
 
 	void paint(Painter& painter) override {

firmware/application/ui_menu.cpp

@@ -32,17 +32,19 @@ void MenuItemView::select() {
 }
 
 void MenuItemView::highlight() {
-	set_highlight(true);
+	set_highlighted(true);
+	set_dirty();
 }
 
 void MenuItemView::unhighlight() {
-	set_highlight(false);
+	set_highlighted(false);
+	set_dirty();
 }
 
 void MenuItemView::paint(Painter& painter) {
 	const auto r = screen_rect();
 
-	const auto paint_style = (flags.highlighted && parent()->has_focus()) ? style().invert() : style();
+	const auto paint_style = (highlighted() && parent()->has_focus()) ? style().invert() : style();
 
 	const auto font_height = paint_style.font.line_height();
 
@@ -58,11 +60,6 @@ void MenuItemView::paint(Painter& painter) {
 	);
 }
 
-void MenuItemView::set_highlight(const bool value) {
-	flags.highlighted = value;
-	set_dirty();
-}
-
 /* MenuView **************************************************************/
 
 MenuView::~MenuView() {

firmware/application/ui_menu.hpp

@@ -53,8 +53,6 @@ public:
 
 private:
 	const MenuItem item;
-
-	void set_highlight(const bool value);
 };
 
 class MenuView : public View {
@@ -62,7 +60,7 @@ public:
 	std::function<void(void)> on_left;
 
 	MenuView() {
-		flags.focusable = true;
+		set_focusable(true);
 	}
 
 	~MenuView();

firmware/application/ui_receiver.cpp

@@ -38,7 +38,7 @@ FrequencyField::FrequencyField(
 	length_ { 11 },
 	range(rf::tuning_range)
 {
-	flags.focusable = true;
+	set_focusable(true);
 }
 
 rf::Frequency FrequencyField::value() const {