tweak(drawable): Decouple tint update step from render update

[xezon]

• Resolves Selection flash is improperly scaled by frame rate #1642

This change decouples the tint update step from the render update.

TODO

• Replicate in Generals

[Skyaero42]

Ok

[xezon]

Replicated in Generals without conflicts

D:\Projects\TheSuperHackers\GeneralsGameCode>FOR /F "delims=" %b IN ('git merge-base --fork-point main') DO git diff %b  1>changes.patch

D:\Projects\TheSuperHackers\GeneralsGameCode>git diff 16ff7e43b950fc27fb9b37ad3d7b96a54a7eb98b  1>changes.patch

D:\Projects\TheSuperHackers\GeneralsGameCode>git apply -p2 --directory=Generals --reject --whitespace=fix changes.patch
changes.patch:35: trailing whitespace.
                        if (decayRate.Length() > m_currentColor.Length() || m_currentColor.Length() <= FADE_RATE_EPSILON)
Checking patch Generals/Code/GameEngine/Include/GameClient/Drawable.h...
Hunk #1 succeeded at 203 (offset -3 lines).
Checking patch Generals/Code/GameEngine/Source/GameClient/Drawable.cpp...
Hunk #1 succeeded at 4784 (offset -757 lines).
Hunk #2 succeeded at 4797 (offset -757 lines).
Hunk #3 succeeded at 4830 (offset -757 lines).
Hunk #4 succeeded at 4842 (offset -757 lines).
Hunk #5 succeeded at 4876 (offset -757 lines).
Hunk #6 succeeded at 4897 (offset -757 lines).
Applied patch Generals/Code/GameEngine/Include/GameClient/Drawable.h cleanly.
Applied patch Generals/Code/GameEngine/Source/GameClient/Drawable.cpp cleanly.
warning: 1 line applied after fixing whitespace errors.