Version with various fixes and improvements.

• Fixed: Find button didn't scroll properly on Data page
• Workaround for geocaching.com not accepting byte order marks on GPX files.
• Clear list after delete all on list page
• Avoid rare occurrences of database being locked
• Links on registration page
• Error messages shown if GPS not transmitting.
• Cosmetic differences on NavLine
• Magnetic variation not shown when not available.
• Avoid exception messages from List page buttons.