UI: Macro Options saves over the macro it changes

Saving a macro over one with the same name now needs `replace: true`, so Macro Options, which
changes the shortcut and description of a macro that exists, failed to save. It passes
`replace: true`; `options_set_a_shortcut_that_runs_the_macro` covers it.

crates/ui-egui/src/macro_ui.rs

@@ -574,7 +574,8 @@ pub fn save_options(app: &mut SheetApp, name: &str, letter: Option<char>, descri
         };
         o.insert("description".into(), json!(description));
     }
-    match app.run("macro.save", json!({"macro": m})) {
+    // Macro Options changes a macro that exists, so the save replaces it.
+    match app.run("macro.save", json!({"macro": m, "replace": true})) {
         Ok(_) => true,
         Err(e) => {
             app.message = Some(("Macro Options".into(), crate::clean_error(&e)));