Where tool tips are defined in rich text, equivalent pain test
accessible descriptions have been added so that screen readers do not
announce HTML tags.
Refactored date time delegates to use a simpler default editor via a
default item editor factory for QDateTime values, the editor is a
standard QDateTimeEdit with a format that includes seconds and renders
assuming the time is UTC.
Modified the Cabrillo log and Fox log database table models to provide
QDateTime items for the edit role of date time fields, and formated
date time strings including seconds and assumed as UTC for the display
role.
QMake requies the inclusion of sub-projects syntax to introduce source
sub-directories, hopefully this will allow code completion in
QtCreator to function.
