restructure bookmarks/favourite assets

this change will be in two parts because the diffs are an absolute mess

better part-hidden navigation

when a part is hidden, it's now a button that will trigger the 'jump to' navigation menu in the property's line

Add spawnmenu icon to hands SWEP (#1415)

Update command.lua

clamp multiline text editor on screen height

the OK button could be inaccessible on small monitors

fix a quicksetup variable

proxy optimization

if a part-finding function fails repeatedly to find a valid part to cache, stop searching after 250 tries

cleanup damagezone hit markers more

handle with part's onthink, also cleaned up on remove, dumps all hit markers into a shared table for a more thorough pass

add the RefreshZone DoT mode which repeats the damagezone pass later (position may change, entities may come in or out), as opposed to only one sampling and repeating damage on these same entities

add a nicename detailing key information of the damage zone when applicable: DoT, type, damage+scaling, 'do not kill' critical conditions

zoomslider validity check

Blacklist crashing effect (#1413)