Fix all default clippy warnings (#480)

All trivial, fixes were for:
 - #[deny(clippy::if_same_then_else)]
 - #[warn(clippy::explicit_auto_deref)]
 - #[warn(clippy::bool_assert_comparison)]

Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/search/mod.rs

@@ -223,7 +223,7 @@ pub async fn search_for_project(
                     write!(filter_string, " AND ({})", filters)?;
                 }
             } else {
-                filter_string.push_str(&*filters);
+                filter_string.push_str(&filters);
             }
 
             if !filter_string.is_empty() {