Color picker is showing on empty pageview/rect layout

[grzegorzdec]

Reproducible in the sample-magic-script-components-docs - https://github.com/magic-script/magic-script-samples branch magic_script_components_examples

scenes:

• toggle
  
• tab
  
• rectlayout
  

[grozdanov]

MXSCOMP-70

Fix in PR: magic-script/magic-script-components-react-native#437