Changing the color of a hidden element makes it visible

[JanoSlivka]

Hello,

Steps to reproduce:

1. Select an element
2. Set a transparent color with 'd'
3. Hide the element with 'h'
4. Select the element with https://github.com/opensourceBIM/BIMsurfer/blob/4191f247de114248e0989fa66c78f47f022fae8d/viewer/viewer.js#L240
5. Set a color with 'c'
6. Element is visible

Why is element visible?

Thanks