Description of changes:

1. Add single file Kani path to global config, will be useful for some features that are file exclusive (like coverage).
2. Remove popup for kani's path on startup

Resolved issues:

Resolves #120

Testing:

• How is this change tested? Manual

• Is this a refactor change? No

Checklist

• Each commit message has a non-empty body, explaining why the change was made
• Methods or procedures are documented
• Regression or unit tests are included, or existing tests cover the modified code
• My PR is restricted to a single feature or bugfix

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 and MIT licenses.