Add BaseMeshOutline inspector

[Proton-V]

Changes

• Fixes: MeshOutline applied full object instead of outlining #10657

Overview

Added simple inspector helper for BaseMeshOutline abstract class,
used in MeshOutline && MeshOutlineHierarchy, (mb in other custom classes)

Includes

• check current material settings
• force update material settings to default outline mat settings
• add new correct material

Added

• Inspector for BaseMeshOutline abstract class

[keveleigh]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[keveleigh]

Thanks for this!

@Cameron-Micka might want to take a look as well

[Cameron-Micka]

This is amazing, love it! I'll open up a task to port this to MRTK3 as well.

edit: Opened: microsoft/MixedReality-GraphicsTools-Unity#33 😊

[keveleigh]

Thanks for your contribution!