search: Remove newlines from query used for tab_content. (#3976)

Fixes https://github.com/zed-industries/community/issues/2388
Release Notes:

- Fixed tab content of project search overflowing the tab for queries
with newlines.

crates/search/src/project_search.rs

@@ -424,7 +424,8 @@ impl Item for ProjectSearchView {
             .current()
             .as_ref()
             .map(|query| {
-                let query_text = util::truncate_and_trailoff(query, MAX_TAB_TITLE_LEN);
+                let query = query.replace('\n', "");
+                let query_text = util::truncate_and_trailoff(&query, MAX_TAB_TITLE_LEN);
                 query_text.into()
             });
         let tab_name = last_query