* Add a flag to allow the firing fail sound to play with locked primaries
* Adds an equivalent flag for Secondaries
* Make the flags accessible to FRED
* Fix whitespace mistakes
* Yet another whitespace fix
* Move primary fail sound flag check up to avoid wasting processing with unused shots
* Move secondary locked check up to avoid doing unnecessary checks
Adds the framework for loading and saving backgrounds with correct or incorrect angles. Backgrounds in FSO will all have fixed angles internally, and newly created backgrounds in FRED will have fixed angles, but existing mission files will have incorrect angles. The parser will determine whether the mission file contains fixed or unfixed angles and act accordingly. (Actually fixing the angles will be done in part 2.)
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.
* Merge all three comm_order arrays
Were Comm_orders, Sexp_comm_orders, and Player_orders. Now all Player_orders.
* Fix Warnings
* Fix erroneous order warning
* Update Int3 into a warning
* Fix missing location for warning
* Allow Fred to Edit and Allow Command briefs in FRED
They are currently allowed in the game, but not being allowed in Fred was an oversight of mine.
* Allow Command brief saving in qtFRED
Add FRED comments. These aren't the typical source-code style comments that are embedded in mission or table files; these are regular strings that are stored as mission data. You might think of them as annotations. Right-click on any node in the event tree and click on Edit Comment to add one. The tree node will then show a different icon and the comment will be visible as a tooltip when you mouse over the node text.
For quite some time missions have had the ability to edit more than one background. This was previously used for fallback loading in case the first background's bitmaps were not available, but I realized it would be very handy to allow switching between backgrounds for in-mission jumps.
The FRED background dialog can now add and remove backgrounds from the list. Additionally, a new `change-background` sexp can instantly switch between backgrounds without messing around with bitmap references.
This adds the titular feature, as well as FRED support. There are also some associated minor UI fixes in FRED and some cleanup in missiongoals.cpp. And "Event Flags" are now a thing in case we want to add any other flags in the future.
Birk Magnussen