Reduces perf impact when a script calls one of the order functions. Especially if dealing with fast timers.

See also commit cf1c3fb.

Doxygen comments are preserved.

Fixes #316

Co-authored-by: perim <perim@users.noreply.github.com>

Libcampaign has had this feature for a long while now.

Co-authored-by: perim <perim@users.noreply.github.com>

It's unused and libcampaign orders VTOLs to retreat now.

For convenience, save MP server IP/hostname to config and propose this
the next time.

Many modern games present a quick shortcut to continue playing using
the last saved game. Also add a new CLI option --continue.

A fairly close conversion of the classic Nexus AI ported to JavaScript.

Otherwise the game will think it's still in the tutorial mode, should one visit it, then to another game mode.

Co-authored-by: topimiettinen <topimiettinen@users.noreply.github.com>

Co-authored-by: EuPhobos <EuPhobos@users.noreply.github.com>

Co-authored-by: kreuvf <kreuvf@users.noreply.github.com>

In addition to maps with exact match to tech level requested, add maps
where only the tech level is different, if a more specific map has not
been added. This lets us drop many maps which differ only by -T1/T2/T3
prefix.

Let challenge ini files also specify the tech level.

Center vertically the blue area of Load Campaign/Skirmish Game menus
for more pleasant look in 640x480 resolution. Use the same large font
for Challenges banner label as for Load Game.

In case a map had JSON format ini file (for example Fishnets has this
but SK-Rush doesn't have), the old tech level in the map was
overriding user selected tech level. Remove old code.

As a new option, remove structures which exceed structure limits. This
allows use of full bases while still making meaningful limits.

If structure limits are enforced and VTOLs are disabled, disable also
AA structures and related research. This improves the AIs in no-VTOL
games. Likewise, disable useless research for no-cyborg, no-lassat and
no-satlink games.

Closes #510.

Uses the regular GUI blue box color to match with releases before 3.1.

Modern games often have a way to save and load the game quickly
without prompting using function keys. Reassign Toggle Radar (F7) to
shift-F7 and Toggle Console (F8) to shift-F8, then use F7 for
Quick Save and F8 for Quick Load.

- Adds " (Ally)" for team chat, or, " (Global)" for everything else when displaying messages locally.
- Messages from self stay white instead of turning yellow when enabling friend/foe radar colors.

Up to 1600. Small map zoom settings could make the camera get way too close to terrain or other
surrounding objects near the start position.

* Bunker Buster reloads in 8 seconds instead of 20 seconds.
* VTOL Bunker Buster can fire two rounds before rearming.

Closes ticket:4861.

6-player map melting had a player 0 derrick assigned to player 4.

Closes #507.

Allow the user to modify most graphics, video and mouse options as
well as key mappings when playing.

The pump sound depends on the current animation of the derrick. This was presumably forgotten
about and wasn't reimplemented after commit af9c913 (see display3d.cpp diffs).

Turns up the sound volume a tiny bit, and, makes it a "oneshot" sound.

Closes ticket:4766.

Modern games often save the game automatically every now and then, so
let's do that!