Correct Track start Timestamp calculations
Implement multi-selection capability for RouteManagerDialog lists
Improve Context menu "Send to GPS" port selection logic
Increase selection "hot spot" radius for Tide icon.
Remove "Export All" button from RouteManagerDialog
Improve Dashboard text rendering for small text size.
Prevent deletion of Dashboard window as parent of Preferences dialog
Increase Dashboard watchdog timeout value to 10 sec.
Improve linux/Mac Serial device detection