Allow modders to play an animation when objects with production queues are researching techs.
Reviewed by: @Angen
Comments by: @Krinkle, @bb
Thread: https://wildfiregames.com/forum/index.php?/topic/27329-visual-feedback-for-researching/&tab=comments#comment-389598
Differential Revision: https://code.wildfiregames.com/D2459