v2: Don't set WinSta0 permanent, update processes window station monitor info every time it's being updated, from the host or from the registry. It'll make an additional wineserver request on every process when the display cache is updated from the registry, but hopefully that's not too bad (it happens after a whole lot of other registry related requests anyway). We could perhaps later consider to use this to update the cache instead of registry operations, to save some requests.