clean up nodetypes attribution + turn off 'others' category heuristics as it creates a case where TW.categories is not always the inverse relation than TW.catDict, which too many things rely upon to be allowed

for instance if explorer html will be modified by downstream app like comex to use another topbar

it becomes the default even if not selected in defaultColoring (because it is always available and interesting) and its filled with correct values even if never run before and therefore not in TW.Facets list

(used to be for meso view only

better facet-options modal dialog layout + better conditional fill values in form + spacing in titling metric + no need to hard-code dynamic attrs options in html since they were added to TW.Facets in commit c4a93fb1 + sigmaListeners needed to create forms *after* dynamic attrs first scan

(previously only the navbar-brand 'ProjectExplorer' did)

facets: rationalize varnames, update doc

server_menu.json remains at project root while associated DBs are in new files called project_conf.json in each project dir

polyvalent but esp. used for https://github.com/moma/comex2/commit/1b5c4b7

POSSIBLE: remove settings_explorerjs.js from the repo and ask the users to create it from twpresets/settings_explorerjs.devdefault.js ?

first draft to test and expand