Add "Skybox navarea" finding/removing functionality.

Fix ladder creating commands sometimes snapping to the wrong ladders.

increase batch size for generate_cheap_expanded if it's not creating any areas

Change "corrupt" ratio to >0.15 of all navareas

Add new command "navmesh_iscorrupt"
+ global func navmeshIsCorrupted()

generate_cheap_expanded improvements ( less crashing on massive maps! )
navmesh_delete_allareas crashing on massive maps fix

Generation, and optimizing commands now flash the window when they finish.

Manual ladder building command gives a bit of wiggle room.

Made generate_cheap_expanded much more thorough.

Improve console prints.

New file, moved displacement trim to it
Added navmesh_trim_deepunderwater_areas and helper func navmesh_delete_allareas

Big changes
Overall polish in all areas

Optimizer commands don't freeze your game anymore
Fixed "nav_edit 1" sticking around for too long.


Added hooks;

navoptimizer_done_gencheapexpanded, Runs when *_generate_cheap_expanded is finished.
navoptimizer_done_globalmerge, Runs when *_globalmerge is finished.


Added ladder creating commands;

navmesh_ladderusable_build, Creates a navladder on the func_usableladder under your cursor
navmesh_ladderusable_buildmanual_snap, Same as above, but you can drag to resize the navladder
navmesh_ladder_buildmanual, Drag a ladder anywhere
navmesh_ladderusable_showall, Shows all unmeshed ladders via "developer 1" debug visualizers
navmesh_ladderusable_tp, Teleports you to the nearest un-navmeshed usableladder


Added experimental navmesh_patch_gap command
Allows for fast patching of doorways, vent entrances, etc.
Don't rely on this, it breaks often, in catastrophic ways.

Huge update
Replaced all generation commands with the extremely versatile

navmesh_generate_cheap_plyseeds
navmesh_generate_cheap_expanded

Added hooks.

navoptimizer_addclassesusuallyinsidethemap
navoptimizer_replaceclassesusuallyinsidethemap

navoptimizer_handlepotentialseedclass
navoptimizer_comprehensiveseedpositions_postbuilt

See code for examples/descriptions

+Small tweaks & fixes.

Stupid fix

More nav_generate_cheap_keepsession tweaks

nav_generate_cheap_keepsession fix