DOCK WORKING!

Update editor element to use mouse regions instead of dispatch event for mouse events
Fix bug in presenter where mouse region handlers were stored on click and called instead of more up to date handlers from subsequent renders
Changed MouseRegion to require discriminants in all cases
Add scroll wheel event to MouseRegion
Polished a bunch of dock inconsistencies

Co-Authored-By: Mikayla Maki <mikayla@zed.dev>

crates/terminal/src/terminal_element.rs

@@ -366,7 +366,7 @@ impl TerminalElement {
     ) {
         let connection = self.terminal;
 
-        let mut region = MouseRegion::new(view_id, None, visible_bounds);
+        let mut region = MouseRegion::new::<Self>(view_id, view_id, visible_bounds);
 
         // Terminal Emulator controlled behavior:
         region = region