To enforce type safety for arrival and departure locations, this converts them to enum classes. Various casts are added when appropriate to convert between the indexed and enum values.
FRED has an autosave feature but it wasn't invoked in too many places. This adds autosaving whenever a major dialog is closed, unless it was closed by hitting Cancel. NB: Autosave is not yet implemented in qtFRED.
Also, `addvariabledlg` incorrectly referred to `OnOk` instead of `OnOK` and `CMessageEditorDlg` incorrectly referred to `OnOK` instead of `OnOk`, so this fixes those and distinguishes `OnOk` by renaming it `OnButtonOk` to be consistent with the event editor and other dialogs.
* Add "no-first-wave-message" wing flag
For when you want custom dialogue for the first wave, and automatic announcements for the rest.
* Fix FRED macro name
Same arrival warp when docked, same departure warp when docked, and associated changes to FRED, set-arrival-info, and set-departure-info.
Also fixes the nav-carry flag to properly save when a mission is saved. Previously that flag would always be cleared.
Implements feature from #4095.
1) Fixes the ship and wing dialog resizing for both sexp help and arrival/departure cues
2) Restores the sexp help in the Mission Goals dialog, which had been broken since the mini-help-box was added
Partial revert of Mantis #2053:
http://scp.indiegames.us/mantis/view.php?id=2053
The patch was speculative and there was never a confirmed bug. By contrast, there are plenty of existing missions that use Unknown as a ship, wing, or jump node name and work just fine.
This introduces a new mechanism for handling bit flags. Instead of using an int (or two, or three) to write bits into, this uses the std::bitset in a wrapper class that accepts an enum class as input. This means that certain classes of errors we've had a few of in the engine, where a coder used the wrong set of flags or checked them against the wrong variable (SF_STEALTH vs SIF_STEALTH, for example) can now be detected at a compiler level rather than not at all.
Goober5000