Lite - fixed sort on columns that are formatted for seconds or milliseconds

[dphugo]

What does this PR do?

This PR fixes bug/issue #450.

• Used the SortMemberPath property to point to the numeric value for the sorting of the columns that are formatted for seconds or milliseconds under the Server Tab -> Collection Health tabs.
• Increased some column widths to ensure complete header is shown.

Which component(s) does this affect?

• Full Dashboard
• Lite Dashboard
• Lite Tests
• SQL collection scripts
• CLI Installer
• GUI Installer
• Documentation

How was this tested?

Describe the testing you've done. Include:

• SQL Server version(s) tested against:
  • SQL Server 2022
• Steps to verify the change works:
  • Complied and ran the PerformanceMonitorLite project
  • Waited for Collection to finish
  • Browsed to the affected data grids under Server Tab -> Collection Health tabs.
  • Clicked on the affected columns to verify visually that sorting was applied correctly. Also specifically where the output could be a mix of "s" and "ms".

Checklist

• I have read the contributing guide
• My code builds with zero warnings (dotnet build -c Debug)
• I have tested my changes against at least one SQL Server version
• I have not introduced any hardcoded credentials or server names