General promotion star button blink speed changes with framerate

[bobtista]

Body:

Prerequisites

• I have searched for similar issues and confirmed this is not a duplicate

Game Version

• Command & Conquer Generals
• Command & Conquer Generals: Zero Hour
• Other (please specify below)

Bug Description

When you have a general's promotion point to spend, the stars on the promote button blink too fast at high render FPS.

Same kind of issue as 2832 (and the transition/world animation timing in 2056) - a UI animation that should run on wall-clock time.

Reproduction Steps

Start a skirmish (not with -quickstart), earn a general's point so the promote button starts blinking, then raise the render FPS - the blink gets noticeably faster.

Additional Context