Fixed issue with composition/operation button

The buttons vanishes if the user press on a valve on a valve controller,
now it is fixed

src/ui/app.rs

@@ -262,7 +262,7 @@ impl eframe::App for App {
                         }
 
                         // Shortcut mode switcher
-                        if self.shortcut_handler.lock().log_unwrap().is_active(ShortcutMode::operation())&&ui
+                        if self.shortcut_handler.lock().log_unwrap().is_in_operation() && ui
                                 .add(
                                     Button::new("Switch to composition mode")
                                         .stroke(Stroke::NONE)
@@ -277,7 +277,7 @@ impl eframe::App for App {
                                     .lock()
                                     .log_unwrap().activate_mode(ShortcutMode::composition());
                             }
-                        if self.shortcut_handler.lock().log_unwrap().is_active(ShortcutMode::composition())&&ui
+                        if self.shortcut_handler.lock().log_unwrap().is_in_composition() && ui
                                 .add(
                                     Button::new("Switch to operation mode")
                                         .stroke(Stroke::NONE)

src/ui/shortcuts.rs

@@ -83,6 +83,14 @@ impl ShortcutHandler {
     pub fn is_active(&self, mode: ShortcutMode) -> bool {
         self.mode_stack.is_active(mode)
     }
+
+    pub fn is_in_composition(&self) -> bool {
+        self.mode_stack.is_first_layer(FirstLayerModes::Composition)
+    }
+
+    pub fn is_in_operation(&self) -> bool {
+        self.mode_stack.is_first_layer(FirstLayerModes::Operation)
+    }
 }
 
 /// Stack layers of keyboard shortcuts. Controls which shortcuts are active at any given time.
@@ -104,6 +112,10 @@ impl ShortcutModeStack {
         }
     }
 
+    fn is_first_layer(&self, mode: FirstLayerModes) -> bool {
+        self.first == mode
+    }
+
     fn activate(&mut self, mode: ShortcutMode) {
         match mode {
             ShortcutMode::FirstLayer(first) => {