Address issues raised by Nathan

I just had another look at the "Workouts" page and noticed the following (also see attached):
- I think "Add workout log" would be better as "Log New Workout"

Done

- The "Go" button could read "Delete" instead, unless you plan to add other options in the future

Done

- The workouts to be deleted does not reflect the checked workouts (always reads "0 of 3" for me), and the select all checkbox in the table header does not select all

Done

- When trying to sort by the type column, the order is incorrect (e.g., S, C, R)

Done

- Since we have more horizontal space now, please rename "Mins" as "Minutes", or better yet, if you want to merge the two columns into one named "Duration" (e.g., "H:MM"), that would be nicest

Nope. I had enough fun time today. 

- Lastly, "Workout on" could be renamed as "Workout Date"

Done