chore: linting warns removed

src/ui/mod.rs

@@ -147,12 +147,12 @@ fn ui<B: Backend>(
     gui_state: &Arc<Mutex<GuiState>>,
 ) {
     // set max height for container section, needs +4 to deal with docker commands list and borders
-    let mut height = app_data.lock().get_container_len();
-    if height < 12 {
-        height += 4;
+    let height = app_data.lock().get_container_len();
+    let height  = if height < 12 {
+        (height + 4) as u16
     } else {
-        height = 12;
-    }
+        12
+    };
 
     let column_widths = app_data.lock().get_width();
     let has_containers = !app_data.lock().containers.items.is_empty();