added CTkToplevel, fixed CTk dark titlebar changes

test/toplevel_test.py

@@ -0,0 +1,44 @@
+import tkinter
+import customtkinter
+import time
+
+customtkinter.set_appearance_mode("light")
+
+
+class ExampleApp(customtkinter.CTk):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.geometry("400x400")
+        self.title("main CTk window")
+        time.sleep(0.5)
+        self.resizable(False, False)
+
+        self.b1 = customtkinter.CTkButton(self, text="Add another window", command=self.newWindow)
+        self.b1.pack(side="top", padx=40, pady=40)
+        self.c1 = customtkinter.CTkCheckBox(self, text="dark mode", command=self.change_mode)
+        self.c1.pack()
+        self.count = 0
+
+    def change_mode(self):
+        if self.c1.get() == 1:
+            customtkinter.set_appearance_mode("dark")
+        else:
+            customtkinter.set_appearance_mode("light")
+
+    def newWindow(self):
+        self.count += 1
+
+        window = customtkinter.CTkToplevel(self)
+        window.configure(bg=("lime", "darkgreen"))
+        window.title("CTkToplevel window")
+        window.geometry("400x200")
+        window.resizable(False, False)
+
+        label = customtkinter.CTkLabel(window, text=f"This is CTkToplevel window number {self.count}")
+        label.pack(side="top", fill="both", expand=True, padx=40, pady=40)
+
+
+if __name__ == "__main__":
+    root = ExampleApp()
+    time.sleep(0.5)
+    root.mainloop()