Enhanced player stability and added exit confirmation

- Fixed VLC display errors by implementing PIL fallback for images
- Added comprehensive timer management with individual error handling
- Implemented watchdog timers to prevent freezing during media transitions
- Enhanced exit functionality with quickconnect code confirmation dialog
- Improved settings window behavior with proper modal focus
- Added transition protection to prevent rapid media cycling
- Enhanced error handling throughout the application
- Fixed controls window cleanup and destruction process

signage_player/appsettings.py

@@ -12,13 +12,33 @@ class AppSettingsWindow(tk.Tk):
         self.geometry('440x600')  # Increased height for better button visibility
         self.resizable(False, False)
         self.config(bg='#23272e')
+        
+        # Ensure window appears on top and gets focus
         self.attributes('-topmost', True)
+        self.lift()
         self.focus_force()
+        self.grab_set()  # Make window modal
+        
+        # Center the window on screen
+        self.center_window()
+        
         self.fields = {}
         self.load_config()
         self.style = ttk.Style(self)
         self.set_styles()
         self.create_widgets()
+        
+        # Ensure focus after widgets are created
+        self.after(100, self.focus_force)
+
+    def center_window(self):
+        """Center the settings window on the screen"""
+        self.update_idletasks()
+        width = self.winfo_width()
+        height = self.winfo_height()
+        x = (self.winfo_screenwidth() // 2) - (width // 2)
+        y = (self.winfo_screenheight() // 2) - (height // 2)
+        self.geometry(f'{width}x{height}+{x}+{y}')
 
     def set_styles(self):
         self.style.theme_use('clam')