Allow user to enter and update metadata about the LatLong points
- the UI needs an editor to allow the user to initially add and also modify the metadata information related to a LatLong point.
- the editor could be showing up immediately when adding a new location but considering that there is a small number of locations that would have additional info it is recommended to add the bare locations right away and open the editor upon request from the user
- show buttons below the list with add / edit additional info
- double click item in list opens editor
related to #9 (closed) and #10 (closed)