Use ESC to cancel dragging in Zed (#30318)

Closes https://github.com/zed-industries/zed/issues/11887

ESC is always captured in terminal due to 


https://github.com/zed-industries/zed/blob/980bfae331dd5078bbba9fe0f3993d9ad5ca6e29/crates/terminal/src/terminal.rs#L1339-L1353

so this part is not fixed.

Otherwise, all other drags are cancelled when ESC is pressed:


https://github.com/user-attachments/assets/6e70a1e5-c244-420b-9dec-ae2ac2997a59


Release Notes:

- Allowed to use ESC to cancel dragging in Zed

crates/workspace/src/pane.rs

@@ -3326,6 +3326,13 @@ impl Render for Pane {
                     }
                 }),
             )
+            .on_action(cx.listener(|_, _: &menu::Cancel, window, cx| {
+                if cx.stop_active_drag(window) {
+                    return;
+                } else {
+                    cx.propagate();
+                }
+            }))
             .when(self.active_item().is_some() && display_tab_bar, |pane| {
                 pane.child((self.render_tab_bar.clone())(self, window, cx))
             })

crates/workspace/src/workspace.rs

@@ -5491,14 +5491,15 @@ impl Workspace {
             .ok();
     }
 
-    pub fn cancel(&mut self, _: &menu::Cancel, _: &mut Window, cx: &mut Context<Self>) {
-        if let Some((notification_id, _)) = self.notifications.pop() {
-            dismiss_app_notification(&notification_id, cx);
+    pub fn cancel(&mut self, _: &menu::Cancel, window: &mut Window, cx: &mut Context<Self>) {
+        if cx.stop_active_drag(window) {
             return;
+        } else if let Some((notification_id, _)) = self.notifications.pop() {
+            dismiss_app_notification(&notification_id, cx);
+        } else {
+            cx.emit(Event::ClearActivityIndicator);
+            cx.propagate();
         }
-
-        cx.emit(Event::ClearActivityIndicator);
-        cx.propagate();
     }
 }