[Bug 44680] New: Support for DTM_GETIDEALSIZE not implemented

https://bugs.winehq.org/show_bug.cgi?id=44680

Bug ID: 44680
           Summary: Support for DTM_GETIDEALSIZE not implemented
           Product: Wine
           Version: 3.0
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: comctl32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

When "Windows Version" is set to "Vista" or later, date picker controls in
programs written using wxWidgets disappear because wxWidgets assumes that
DTM_GETIDEALSIZE is available in these Windows versions (see
https://github.com/wxWidgets/wxWidgets/blob/v3.1.1/src/msw/datetimectrl.cpp#...),
but it isn't in Wine, so we just get "err:datetime:DATETIME_WindowProc unknown
msg 100f" on the console and the control is created with 0 size.

We could work around this in wx but, ideally, Wine should handle this message.
Even returning some hard coded size from it would be better than not handling
it at all.