Feat: deleting step name when deleting the step

src/services/pattern_editor.rs

@@ -97,12 +97,14 @@ pub fn delete_step(project: &mut Project, bank: usize, pattern: usize, step: usi
         if s.source == Some(step as u8) {
             s.source = None;
             s.script.clear();
+            s.name = None;
         }
     }
 
     set_step_script(project, bank, pattern, step, String::new());
     if let Some(s) = project.pattern_at_mut(bank, pattern).step_mut(step) {
         s.source = None;
+        s.name = None;
     }
     PatternEdit::new(bank, pattern)
 }