[DONE] Increased alien hidden movement speed (and player movement speed)

[Meridian]

New OXCE v6.4.2 is up.

2020-03-15
 - MUCH MUCH faster alien hidden movement (regardless of alien movement speed setting)
 - much faster player movement speed at higher player movement speed settings in Options (same as in year 2018 and earlier versions)
 - (supposedly) more battery drain on laptops/phones (same as in year 2018) -- not confirmed; and not quantified

Download: https://openxcom.org/forum/index.php/topic,5258.0.html

Some of you have already tried this version (it's been published via auto-update) and everybody so far reports big improvements and no side effects.

I'd like to ask everyone else for feedback as well.

IMPORTANT:
To benefit from speed improvements, you need the following settings in Options menu:
1. "Advanced>FPS limit" must be different than 0 (I recommend 60)
2a. Either use software rendering (Video>Display Filter = Disabled)
2b. Or use OpenGL rendering (for example Video>Display Filter = Raw*) AND also set vSyncForOpenGL: false in options.cfg file --- and just to repeat again, DO NOT set "Advanced>FPS Limit" to 0!

This will make OXCE able to run at the same speed as in this video (OpenXcom version from year 2018): https://www.youtube.com/watch?v=hjIrqlsJjQ0
So that you have a benchmark to compare against.

Feedback is most welcome... positive and more importantly also negative.

[Meridian]

To support this critical feature, the VSync for OpenGL option is now available also via the GUI, not only via options.cfg