Currently shell32 only transfers the plain icon for `Shell_NotifyIcon` calls, ignoring balloon icons. This patch allows transferring both images to explorer.exe tray.
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v15: shell32: Add support for balloon icon copying.
shell32: Introduce a new fill_icon_info helper.
shell32: Cleanup some local variable names.
shell32: Introduce a new get_bitmap_info helper.
shell32: Move icon related fields in notify_data into separate struct.
https://gitlab.winehq.org/wine/wine/-/merge_requests/2875