#38 Added selection check to clear button

[mdwigley]

Description

The clear button call back function was missing the selection check before entering the work loop.

Related Issue

#38 Clear Button Doesn't Honor Item Selection

Motivation and Context

Tool breaking bug.

How Has This Been Tested?

Followed the reproduction steps.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have read the CONTRIBUTING document.
• My change requires a change to the game logic.
  • I have linked the project issue above.
• My change requires a change to the assets.
  • I have linked the asset issue above.
• My change requires a change to the documentation.
  • I have linked the documentation issue above.