Don't respond to hit tests from the Win32 window

This will let us detect other, non-wrapper windows to the right and to
the bottom of a plugin GUI. Useful for drag-and-drop so we don't end up
overriding Wine's internal drag-and-drop mechanism.

src/wine-host/editor.h

@@ -72,9 +72,9 @@ xcb_atom_t get_atom_by_name(xcb_connection_t& x11_connection,
 /**
  * Check if the cursor is within a Wine window. We can of course only detect
  * Wine applications within the current prefix. This ignores the extended client
- * area of yabridge windows (which might mean that this function will spuriously
- * return false if another window on the bottom right of an editor window is
- * 'obstructed' by this clipped, invisible window).
+ * area of yabridge windows. (so it will consider other Wine windows to the
+ * right or to the bottom of a yabridge plugin editor, but not the extended
+ * client area itself)
  */
 bool is_cursor_in_wine_window() noexcept;