[BUG] SimpleEmptyButton and SimpleActionButton prefabs have missing "See It Say It Label" GameObject reference

[ms-RistoRK]

Describe the bug

SimpleEmptyButton and SimpleActionButton prefabs have missing "See It Say It Label" GameObject as in:

To reproduce

Steps to reproduce the behavior:
On latest MRTK3 main branch

1. Go to UnityProjects\MRTKDevTemplate\Assets\Scenes\Experimental\CanvasExampleSimpleActionButton.unity scene
2. Click on any SimpleActionButton in the scene, for example:
   
3. In Inspector scroll down to 'See It Say It Label' component
4. See missing GameObject, for example:
   
5. Run the scene
6. See in Console errors related to missing SeeItSayItLabelEnabler GameObject, for example:
   

Expected behavior

The scene should be able to run without errors reported in Console and the See It Say It Label should have a GameObject reference. For example:

Screenshots

Corresponding screenshots added above ^.

Your setup (please complete the following information)

• Unity Version 2021.3.21f1
• MRTK Version 3 or Commit bbdc68f

Target platform (please complete the following information)

• HoloLens 2