getOrSetColor() is always called when moving mouse.

Hi.
I was doing some research and noticed that method `getOrSetColors(newValue) `from `particle-view.js ` is always called when moving the mouse.
Especially this part:
`if (isFloat32Array(newValue) && newValue.length === colors.length) {
colors = newValue;
geometry.getAttribute('customColor').needsUpdate = true;
}`
Looks like this if condition is always true.
I don't know if this is an intentional behavior so I thought I'll open an issue.

Read particle-view.js and trace the mouse-movement path that calls getOrSetColors(newValue). Check whether the Float32Array and length condition are expected on every call, then determine the intended update behavior. Done means the issue's unnecessary or unintended repeated update is confirmed and covered by the project's available verification steps.

Written by the indexing model from the issue text.