Small fixes to task modal & long commands (#8974)

* Show the entire task tooltip on terminal tab hover:
<img width="979" alt="Screenshot 2024-03-07 at 01 40 56"
src="https://github.com/zed-industries/zed/assets/2690773/bc274a5c-70f6-4f3d-87b4-04aff3594089">

* Scroll to the end of the query when a menu label is reused as a query:
<img width="658" alt="Screenshot 2024-03-07 at 01 41 03"
src="https://github.com/zed-industries/zed/assets/2690773/972857f4-36db-49dc-8fa1-dd15e0470660">

Release Notes:

- Improved task modal UX with long bash-like commands

crates/terminal/src/terminal.rs

@@ -1365,7 +1365,13 @@ impl Terminal {
     pub fn title(&self, truncate: bool) -> String {
         const MAX_CHARS: usize = 25;
         match &self.task {
-            Some(task_state) => truncate_and_trailoff(&task_state.label, MAX_CHARS),
+            Some(task_state) => {
+                if truncate {
+                    truncate_and_trailoff(&task_state.label, MAX_CHARS)
+                } else {
+                    task_state.label.clone()
+                }
+            }
             None => self
                 .foreground_process_info
                 .as_ref()