agent: Fix opening configuration view from the model selector (#28154)

This PR fixes an issue where opening the configuration view from the
model selector in the Agent (or inline assist) was not working properly.

Fixes https://github.com/zed-industries/zed/issues/28078.

Release Notes:

- Agent Beta: Fixed an issue where selecting "Configure" in the model
selector would not bring up the configuration view.

crates/assistant/src/assistant_panel.rs

@@ -37,11 +37,11 @@ use ui::{ContextMenu, PopoverMenu, Tooltip, prelude::*};
 use util::{ResultExt, maybe};
 use workspace::DraggedTab;
 use workspace::{
-    DraggedSelection, Pane, ShowConfiguration, ToggleZoom, Workspace,
+    DraggedSelection, Pane, ToggleZoom, Workspace,
     dock::{DockPosition, Panel, PanelEvent},
     pane,
 };
-use zed_actions::assistant::{InlineAssist, OpenPromptLibrary, ToggleFocus};
+use zed_actions::assistant::{InlineAssist, OpenPromptLibrary, ShowConfiguration, ToggleFocus};
 
 pub fn init(cx: &mut App) {
     workspace::FollowableViewRegistry::register::<ContextEditor>(cx);