[10718] Partly revert "[10687] UInt32 timer class copies instead using time_t timers for mstime case

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<pre>m src/game/MapManager.cpp
m src/game/MapManager.h
m src/game/World.cpp
m src/game/World.h
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[10718] Partly revert "[10687] UInt32 timer class copies instead using time_t timers for mstime cases."

This reverts commit 967877fefd91e00895f9790dc006b532b94d41b7
in part MapManager/World timers.

Main reason: unclear source cases wrong mstime diff generation at WorldRunnable level at *nix systems.
So need have existed in past hacks that skip its.</pre>




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