graphics/gpxsee: Update to 7.8

Changelog since 7.6:

• Added support for QuadTiles maps.
• Added (optional) km/mi path markers.
• Fixed broken IMG maps after print/PDF export.
• Fixed broken zoom fit on IMG maps.
• Fixed broken WMS scale denominators to zoom levels transition.
• Fixed build & display issues with Qt < 5.4.
• Added support for vector maps projection setting.
• Added support for user defined TYP files for Garmin IMG maps.
• Removed obsolete "Always show the map" setting.

https://build.opensuse.org/package/view_file/home:tumic:GPXSee/gpxsee/gpxsee.changes

PR: 238238
Submitted by: Nikolay Korotkiy <sikmir@gmail.com> (maintainer)