Manual: Update a bunch of obsolete or inaccurate references, other small changes

doc/editor/Items.html

@@ -13,7 +13,7 @@
 <h1>Section 8 - Editing Item Types</h1>
 
 <p>Your default scenario comes with 383 premade item types, number 0 to 382, and you can
-have 400 item types overall. Like terrain types, you can customize the item types to suit
+add as many new types as you wish. Like terrain types, you can customize the item types to suit
 your scenario. Click on Edit Item Types to bring up a list of items, and click on an item
 type to bring up the item editing window. This window has these options:</p>
 <ul>
@@ -49,7 +49,7 @@ to see if the party has a special item. Set an item's special class here (0 for
 class).
 <br>For example, an item Boat Ticket can have special class 1, and a special node
 which checks if the party has a ticket can check for special class 1. Note that items with
-a non-zero special class are taken away from the party when they leave the
+a non-zero special class have the special class set to 0 when the party leaves the
 scenario.</li>
 <li><b>Weapon key skill:</b> If the item is a weapon of any kind (but not ammunition such as
 arrows), there will be a place to enter in the key skill for the weapon. You can click the