Patch Notes: Exploit fixes - buffs, quickload, crafted goods

Spells

Re-casting an effect that is already on you or a target now resets it to that cast's full duration. It no longer adds the new duration on top, and a shorter re-cast never cuts a longer one short.
This applies to buffs and debuffs alike. That covers Shield, Fortify, Regenerate, Levitate, Light, Detect, the resistances and the rest; Paralyze, Silence, Continuous Damage and Soul Trap; a party member's spells on you; and a torch's fire on a foe.
Re-casting Regenerate or a Continuous Damage effect on its last round still gives the full number of ticks a fresh cast would.
Buffs banked before this update keep their time and run out normally. You can also end them yourself from the buff icons.

When a window is open, F11 (Quick Load) now works only from the death screen. Loading from under your pack, a loot window or a sell counter could duplicate what that window was holding.
Any load closes every open window before the save is read, including windows left waiting behind the death screen.

Shops pay for a crafted Superior or Masterwork piece what they pay for the plain piece its recipe makes. The quality's magic or rare lines are power, not resale value: the piece keeps them, and keeps its worth to other players.
Patrons follow the same rule for crafted pieces. Found magic and rare items are priced as before.
The keyed shelf now prices a sale exactly as the trade window does, and no longer buys conjured (Create Item) pieces.

A character whose trade is on hold can no longer move its crafted pieces through another character, by listing, auctioning, filling a commission or disenchanting. Its Stores also cannot go into a guild's Stores or fill a guild writ.

Exploit audit: buffs renew instead of stacking, quickload dupe, crafted-item gold farm, crafted-piece hold bypass by @Lattymoy in #788

Full Changelog: app-v0.1.7947...app-v0.1.7961