Confirm out_time_ms is a number

[BrandonHalig]

Description

In get_latest_ms_progress(), the value of out_time_ms can equal 'N/A\n', this code will prevent a ValueError when dividing a string by a number. Since this is only a progress indicator, it should not crash the program.

Issue Fixes

Prevents a ValueError when dividing a string by a number

Checklist:

• I am pushing changes to the develop branch
• I am using the recommended development environment
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have formatted and linted my code using python-black and pylint
• I have cleaned up unnecessary files
• My changes generate no new warnings
• My changes follow the existing code-style
• My changes are relevant to the project

Any other information (e.g how to test the changes)

None