(Bug 4796) Use the correct option value for showlocation

showlocation expects values of Y/N/F/R, but the select dropdown was
mismatched A/N/F/R, which led to a mismatch.

Fix is to make sure we have consistent values all around.

This also makes the order of the options in the dropdown consistent.
Merge pull request #189 from afuna/location-setting-bug4796

(Bug 4796) Use the correct option value for showlocation