[FEATURE REQUEST] Notification if file browser is not compatible

[Cx01N]

Is your feature request related to a problem? Please describe. The file browser doesn't work in powershell 2 agents and does not give a response to the user. https://github.com/BC-SECURITY/Starkiller/issues/67

Describe the solution you'd like Starkiller should give a notification or popup message on the file browser that it is not compatible with powershell 2 instances.

Describe alternatives you've considered We can build a different way to do the file browser that does not rely on "convertto-json" but that doesn't seem practical.

Additional context