[PATCH v2 0/6] MR6671: winex11: Initial refactoring of XDND code.

[Rémi Bernon]

In preparation for moving the PE side DND code to win32u/user32 and factoring it between drivers.

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  v2: winex11: Allocate the XDND data object dynamically.
      winex11: Use IDataObject to get CF_HDROP format for WM_DROPFILES.
      winex11: Cleanup variable names in X11DRV_XDND_SendDropFiles.
      winex11: Use the IDataObject interface to check for CF_HDROP format.
      winex11: Cleanup XDND IDataObject methods and variables.
      winex11: Move the XDND IDataObject implementation around.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/6671