Don't show apply button on GPU selection

gui/src/app.rs

@@ -135,6 +135,8 @@ impl App {
                 .set_ventilation_info(fan_control_info),
             Err(_) => self.root_stack.thermals_page.hide_fan_controls(),
         }
+        
+        self.apply_revealer.hide();
     }
 
     fn start_stats_update_loop(&self, current_gpu_id: Arc<AtomicU32>) {

gui/src/app/apply_revealer.rs

@@ -27,13 +27,16 @@ impl ApplyRevealer {
     pub fn show(&self) {
         self.container.set_reveal_child(true);
     }
-    
+
+    pub fn hide(&self) {
+        self.container.set_reveal_child(false);
+    }
+
     pub fn connect_apply_button_clicked<F: Fn() + 'static>(&self, f: F) {
         let apply_revealer = self.container.clone();
 
         self.apply_button.connect_clicked(move |_| {
             f();
-            apply_revealer.set_reveal_child(false);
         });
     }
 }