Chrome Extension v7.5.1

• Updated column sort on People page of course to work with new UI.
• Updated column sort on People page of course to use the Canvas API to get the last activity time of users (if applicable) for easier handling of comparisons for sorting that aren't language dependent.
• Updated sorting of total activity time to be based on expected format of cells rather than requiring a specific column name
• Removed specific column name requirements so it should be able to work with other languages (*May need additional testing)