Fix mod incompatibilities

Fix stutters by disabling market updater while unpaused, and making it work only in paused state.
Allow to fully disable market updater (see stelnet.json).
Fix query and viewer market settings not being read correctly.
Improve Stelnet-Starpocalypse interaction by avoiding updates to the currently opened market.
Fix Salvage Gantry (and other hulls with hidden-only mounts) not showing up in preview or results.
Fix Arma Armatura mod incompatibility (avoid storing hullmods inside a query filter).
Rename default config file stelnet.json.dist to simply stelnet.json.

jaghaimo / stelnet