* WebHost: Round percentage of checks, fix possible 500 error
* Round using str.format in the template
How the percentage of checks done should be displayed is a display
concern, so it makes sense to just always do it in the template. That
way, along with using .format() instead of .round, means we always get
exactly the same presentation regardless of whether it ends in .00
(which would not round to two decimal places), is an int (which
`round(2)` wouldn't touch at all), etc.
* Round percent_total_checks_done in lttp multitracker
* Fix non-LttP games showing as 0% done in LttP MultiTracker
