Bind help windows to the current monitor's bread-theme palette

Pin bread-theme to v0.7.4.

src/theme.rs

@@ -81,3 +81,8 @@ pub fn load(_display: &gtk4::gdk::Display) {
     bread_theme::gtk::apply_shared();
     APP_PROVIDER.with(|cell| bread_theme::gtk::apply_css(APP_CSS, cell));
 }
+
+pub fn bind_window(window: &impl gtk4::prelude::IsA<gtk4::Native>) {
+    bread_theme::gtk::bind_window_auto_with_app_css(window, |_| APP_CSS.to_string());
+}
+

src/ui/tour/callout.rs

@@ -49,6 +49,7 @@ pub fn build(
     window.set_layer(Layer::Overlay);
     window.set_keyboard_mode(KeyboardMode::OnDemand);
     window.set_monitor(Some(monitor));
+    crate::theme::bind_window(&window);
 
     if let Some(rect) = rect {
         let (mon_w, mon_h) = monitor_size;

src/ui/tour/mask.rs

@@ -20,6 +20,7 @@ fn new_mask_window(monitor: &gdk4::Monitor) -> Window {
     window.set_layer(Layer::Overlay);
     window.set_keyboard_mode(KeyboardMode::None);
     window.set_monitor(Some(monitor));
+    crate::theme::bind_window(&window);
     let dim = GBox::new(gtk4::Orientation::Vertical, 0);
     dim.add_css_class("tour-mask");
     dim.set_hexpand(true);

src/ui/troubleshoot_wizard.rs

@@ -38,6 +38,7 @@ pub fn open(parent: &impl IsA<gtk4::Window>, on_build: impl FnOnce(&Window)) {
         .default_height(360)
         .build();
     window.add_css_class("wizard-dialog");
+    crate::theme::bind_window(&window);
     let header = gtk4::HeaderBar::new();
     header.set_show_title_buttons(true);
     window.set_titlebar(Some(&header));

src/ui/window.rs

@@ -131,6 +131,7 @@ fn build(app: &Application) -> Handle {
         .build();
 
     crate::theme::load(&WidgetExt::display(&window));
+    crate::theme::bind_window(&window);
 
     let store = Rc::new(ContentStore::load());
     let binds = Rc::new(keybinds::load());