Modify demo + BorderlessWindow to support redraw on move/resize about imgui-borderless-win32 HOT 2 CLOSED

Solution with 3135ffb

Both WM_MOVE and WM_SIZING begin with a WM_ENTERSIZEMOVE where we can call SetTimer(...) to emit WM_TIMER window messages that are continually handled during the "blocking" sizemove at intervals of USER_TIMER_MINIMUM which is defined as 10ms. In practice that timer resolution is extremely variable and on my system it was somewhere around ~15ms or about 65fps. This gives a lower asymptote of refresh rate at whatever the timer is on a given frame with a theoretical lower bound of a frame every 10ms. For instance however, the refresh rate can functionally be much higher, as the rate a user traverses screen points with their cursor is analogous to the rate of redrawing if the rate is faster than the rate of the timer.

More involved ways exist to achieve a higher refresh rate, such as an algorithm over multiple user timers, using multimedia timers, etc.

Links: red/REP#26
Links: https://learn.microsoft.com/en-us/previous-versions/dd757634(v=vs.85)

from imgui-borderless-win32.

Youtube Demo using user timers

from imgui-borderless-win32.