-some minor optimization

-optimization for some AI routines
-fix to prevent some of the automatic forward observer messages from being spammed

-fix for a small problem with the melee AI in path planning mode

-hotfix for last patch

//new update:
-units with custom movement animation will now work with the PATH PLANNING MODE
-WebKnight and Devourerking12 mods; zombies, special infected, melee units, OPTRE precursors and the necroplague mutant mod

-fixed enemy vehicles target icons not showing even after the vehicle was spotted
-fixed mortar turrets not receiving the indirect fire trait
-changes to the init function that finds the unit traits to make it faster

-added Left Control as an alternative to the left mouse button when setting the Supressive Fire arc. (Patreon request)
*to prevent the player from inadvertently selecting another unit or object when clicking to set the arc.

-added an option that when enabled will require the 'SHIFT' key to be pressed in order to use the take cover action. (Patreon request)

-new addon option; Require key to open context sensitive menus
*enable this option to require the player to press a shortcut key, default is 'B' but it can be modified in the control options, to show the context sensitive menus associated with objects such as vehicles and enemy group icons.

-changed defensive grenade throw; units that are supressed behind cover will throw grenades at enemies that approach from the same direction that they were last shot at from
*meant to encourage flanking and give the AI some counterplay against suppression

-fix for the RHS BM-21 artillery fire support

-fixed an issue where artillery units wouldn't fire properly after being resupplied