Add option to disable min/max windows buttons

This commit introduces the functionality to disable the minimise and maximise buttons on windows. These options have been added to the `application.WebviewWindowOptions` and integrated in the Windows application logic. Effectively, developers can now control the availability of these buttons in their windows applications.

v3/examples/window/main.go

@@ -60,6 +60,35 @@ func main() {
 				Show()
 			windowCounter++
 		})
+	if runtime.GOOS != "linux" {
+		myMenu.Add("New WebviewWindow (Disable Minimise)").
+			OnClick(func(ctx *application.Context) {
+				app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+					Windows: application.WindowsWindow{
+						DisableMinimiseButton: true,
+					},
+				}).
+					SetTitle("WebviewWindow "+strconv.Itoa(windowCounter)).
+					SetRelativePosition(rand.Intn(1000), rand.Intn(800)).
+					SetURL("https://wails.io").
+					Show()
+				windowCounter++
+			})
+		myMenu.Add("New WebviewWindow (Disable Maximise)").
+			OnClick(func(ctx *application.Context) {
+				app.NewWebviewWindowWithOptions(application.WebviewWindowOptions{
+					Windows: application.WindowsWindow{
+						DisableMaximiseButton: true,
+					},
+				}).
+					SetTitle("WebviewWindow "+strconv.Itoa(windowCounter)).
+					SetRelativePosition(rand.Intn(1000), rand.Intn(800)).
+					SetURL("https://wails.io").
+					Show()
+				windowCounter++
+			})
+
+	}
 	myMenu.Add("New WebviewWindow (Hides on Close one time)").
 		SetAccelerator("CmdOrCtrl+H").
 		OnClick(func(ctx *application.Context) {

v3/pkg/application/options_webview_window_win.go

@@ -117,6 +117,12 @@ type WindowsWindow struct {
 
 	// Permissions map for WebView2. If empty, default permissions will be granted.
 	Permissions map[CoreWebView2PermissionKind]CoreWebView2PermissionState
+
+	// Disables the minimise button
+	DisableMinimiseButton bool
+
+	// Disables the maximise button
+	DisableMaximiseButton bool
 }
 
 type Theme int

v3/pkg/application/webview_window_windows.go

@@ -237,6 +237,10 @@ func (w *windowsWebviewWindow) run() {
 
 	w.setSize(options.Width, options.Height)
 
+	// Min/max buttons
+	w.setStyle(!options.Windows.DisableMinimiseButton, w32.WS_MINIMIZEBOX)
+	w.setStyle(!options.Windows.DisableMaximiseButton, w32.WS_MAXIMIZEBOX)
+
 	// Register the window with the application
 	getNativeApplication().registerWindow(w)