allow disabling drag and drop on windows

winit/src/settings/windows.rs

@@ -2,8 +2,19 @@
 //! Platform specific settings for Windows.
 
 /// The platform specific window settings of an application.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct PlatformSpecific {
     /// Parent Window
     pub parent: Option<winapi::shared::windef::HWND>,
+    /// Drap and Drop support
+    pub drag_and_drop: bool,
+}
+
+impl Default for PlatformSpecific {
+    fn default() -> Self {
+        Self {
+            parent: None,
+            drag_and_drop: true,
+        }
+    }
 }