the mailbox takes typing again, and events carry their real arguments

- the mail window's send tab takes typing again: the subject, body and money boxes were taking no input while the recipient box swallowed every key, and a sent letter clears its subject and item icon instead of putting them straight back (2145)
- seven events fire the way the reference does: UNIT_DYNAMIC_FLAGS fires at all, swapping two identical stacks between bank slots fires PLAYERBANKSLOTS_CHANGED twice, the pet sheet's training points repaint, and ITEM_LOCK_CHANGED loses its invented arguments (2140)
- nine widget methods 1.12 addons probe for are in: ShaguTweaks stops recolouring textures the reference leaves alone, pfUI and _Nameplates stop raising on a tooltip's GetAnchorType, and 63 AceEvent addons get RegisterAllEvents (2142)
- six post-1.12 methods leave the widget surface (SetSize, SetShown, HasFocus, SetFormattedText and two tooltip verbs), so an addon reaching for a later client's API finds what a real 1.12 client gives it (2142, 2146)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

crates/benilla-ui/src/script/modelframe.rs

@@ -148,7 +148,7 @@ impl Model {
         }
     }
 
-    /// A size was AUTHORED on `h` (`SetWidth`/`SetHeight`/`SetSize`, the XML `<Size>` through
+    /// A size was AUTHORED on `h` (`SetWidth`/`SetHeight`, the XML `<Size>` through
     /// them): an implicit rect no longer applies to it, for good — the reference's override
     /// yields to any authored size.
     pub(crate) fn note_authored_size(&mut self, h: FrameHandle) {