Add tooltip to help align the name in TrackWaypoint->Acquire menu to the File->Acquire menu
Fix the default value for getting the GPS Protocol in acquire.

Not quite sure what I was thinking when I originally wrote this,
 as the 'garmin_entry' variable is never really used.
Subsequently I have had to replace my GPS, which now uses the file system,
 so I don't use the GPS Protocol method any more so I didn't notice this issue.
Fix not moving the viewport to the data when using TrackWaypoint->Acquire methods.

Autoview relies on the bounds being set up, thus is must happen after the post read stage.
SF Features#116: Add an Acquire From URL option.

Add a dialog to download a file from a specific URL directly into Viking,
using the datasource methods.

By default the downloaded file will be opened as a GPX,
 but any file type supported by GPSBabel can be specified
 (as used by the Import from File option).

If the URL does not resolve, does not return a file, or the file can not be interpreted,
 then simply this will give 'Acquisition Error'