message: Add modslot:extra change to changelog
diff: * Loadout Optimizer shows an estimate of how long it'll take to complete finding sets.
  * DIM shouldn't bounce you to your D1 account when Bungie.net is having issues anymore.
  * `is:maxpower` search now shows all the items at maximum power, instead of just the items that are part of your maximum power loadout. The previous meaning has been moved to `is:maxpowerloadout`. Keep in mind that because of exotics, you may not be able to equip all your max power items at once.
  +* `modslot:extra` now identifies Armor 2.0 items that have an "extra" modslot (currently, a raid or a Nightmare mod slot).
  ### Beta Only
  