We get away with things without these includes because
the build concats lots of C++ files together into
build/flightgear/src/GUI/fglauncher_autogen/mocs_compilation.cpp and luckily
earlier ones had the right includes.
Allow selecting carriers from scenarios, and starting at either a
parking position, or a distance offset from the FLOLS (effectively
a crude ‘on-final’)
Extend the —carrier startup option to accept a runway ident of FLOLS,
in conjunction with the existing —offset-distance argument.
Due to how the popup menu was refresh, using MP servers at index 0 or 1
didn’t work correctly. Change some logic and add a helper to make this
work reliably, without a second Repeater and dummy properties.