Leftover PlatformRequestMove/Resize from a successful Set (Win32 WM_MOVE)
stayed authoritative through the following Begin, so SetNextWindowPos/Size,
clamp, and nav updates on a floating viewport were discarded. Apply the
platform rect in NewFrame and clear the flag when geometry matches the last
submitted request. Keep the flag when the OS actually adjusted the rect.
Drag rebase compares truncated LastPlatform* so a clamped axis does not
hitch the free one.
GLFW: drop the second X connection. Poll live geometry after a stable
unanswered X11 Set instead. Pre-3.4 IsWayland() no longer assumes Wayland
when X11 native headers are missing.
c65a3e2d6e