[PATCH 0/1] MR3197: win32u: Update the display cache when virtual desktop mode changes.

[Rémi Bernon (＠rbernon)]

We update the cache in NtUserCreateDesktopEx, as it may change existing
thread desktop flags, but we need to do it as well when a new desktop is
created while still detached, then attached to a thread through
NtUserSetThreadDesktop.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55146

This is the case when forcing virtual desktop mode with new desktop creation by running `explorer /desktop=test,1024x768 winecfg` for instance.