taxi's weekend pass (fixed bugs, tweaked things, updated ultrakill-modules)

[TaxiService]

ultrakill modules:

• fixed missing flag in buildtrain unloader; updated ITEMS unloader
• reworked entrance stacker
• added rail connectors for entrance/exit
• removed prod3 assemblers after speed3 assemblers
• decreased default amount of prod3-to-stock-per-slice to 500
• removed quick'n'dirty entrance

megamall:

• fixed missing wire on second distractor capsule assembler
• [L] Solagrido now uses buffer chests instead of requester chests
• removed superfluous recipe-less assemblers

wiptip:

• added two more turrets on the back side
• added two more storage chests (to aid in trash conversion)
• added 1 roboport to extend useful loginet range
• added missing arty-unloader outserter that was previously out of range
• updated trash conversion
• fixed typo

shell factory:

• increased cannon trains' inactivity time to 120s
• fixed missing flag in buildtrain unloader

solagrido:

• fixed missing flag in buildtrain unloader

ultrakill rockets:

• fixed missing flag in buildtrain unloader

32^2 walls:

• increased wall-arty's shell request to 20 (from 5)