v1.6d - Endgame fixes and some item-related building things

Another lil' hotfix update! warmfix? room-temperature-fix? I've made this joke already.
This one's mostly to do with the endgame and starting second playthroughs. The polish never ends, so they say!

[h3]BUILDINGS:[/h3]

• Fixed the item analyzer putting dropped materials that touch it in limbo.
  
• Display stands and item analyzers no longer consume the item used. (they get put into your dropped items bag)
  
• Fixed low-level guilds dealing negative damage to high-level bosses.
  

[h3]PROGRESSION:[/h3]

• The centerpiece now displays hint images for all materials needed, not just event mats.
  
• Fixed the friends list being cleared if the game is closed after the ending.
  
• Fixed an ending marker not saving if the game is closed after the ending.