Revert "assistant_context_editor: Close menus on send (#25440)" (#25916)

Reverting https://github.com/zed-industries/zed/pull/25440

This is a good change, but given the PR was open for a while, I guess it
didn't catch conflicts with main, and so it broke it. Will revert it for
now, to keep main fresh, but will look into adding this behavior back
again.

Release Notes:

- N/A

crates/assistant_context_editor/src/context_editor.rs

@@ -336,14 +336,10 @@ impl ContextEditor {
     }
 
     fn assist(&mut self, _: &Assist, window: &mut Window, cx: &mut Context<Self>) {
-        self.slash_menu_handle.hide(cx);
-        self.language_model_selector_menu_handle.hide(cx);
         self.send_to_model(RequestType::Chat, window, cx);
     }
 
     fn edit(&mut self, _: &Edit, window: &mut Window, cx: &mut Context<Self>) {
-        self.slash_menu_handle.hide(cx);
-        self.language_model_selector_menu_handle.hide(cx);
         self.send_to_model(RequestType::SuggestEdits, window, cx);
     }