Build Options disabled on the MRTK Build Window with 2017.2.1.4-RC

[SimonDarksideJ]

Overview

The Build option button remains disabled, even when the project can be built using the Unity build menu for HL / Immersive

Expected Behavior

Build button on the MRTK Build Window should be active for the UWP platform

Actual Behavior

Button is disabled

Steps to reproduce

1: Create a new project
2: Import the 2017.2.1.4-rc package
3: Apply the MR Project settings from the MRTK menu
4: Apply the MR Scene settings from the MRTK menu
5: Save scene and add to build settings
6: Open the MRTK Build window
7: Observe button is disabled

*Note, after manually doing a build, the button becomes active :S

Unity Editor Version

2017.4.1

Mixed Reality Toolkit Release Version

2017.2.1.4-RC

[StephenHodgson]

It's because the bool check for the ability to build is expecting a wsa cert path, that's not set. I'll be sure to port that from my build tooling update in dev.