Change the speed conversion to take mtsPerSec as input
Change the speed conversion to take mtsPerSec as input

And not the section. This makes it more generic and easier to use throughout
the app. Fortunately, the existing method was not used anywhere, so did not
have to change any call sites.

```
$ grep -r getKmph www/
www//js/config/imperial.js:    ic.getKmph = function(section) {
www//js/config/imperial.js:        return (KM_TO_MILES * ic.getKmph(section));
www//js/config/imperial.js:    ic.getFormattedSpeed = USE_IMPERIAL? ic.getMph : ic.getKmph;
www//templates/main-diary-backup.html:                      <div class="col">{{getKmph(section)}}</div>

$ grep -r getFormattedSpeed www/
www//js/config/imperial.js:    ic.getFormattedSpeed = USE_IMPERIAL? ic.getMph : ic.getKmph;
```

shankari/e-mission-phone,e-mission/e-mission-phone,e-mission/e-mission-phone,shankari/e-mission-phone,e-mission/e-mission-phone,shankari/e-mission-phone,e-mission/e-mission-phone,shankari/e-mission-phone