rename setting to "use alt now playing ..."

+ fix right now playing component gap
+ show emoji if there's no search result
+ abstract now playing component settings into one setting
+ break context menu's context item into a component

src/interfaces.ts

@@ -53,7 +53,7 @@ export interface Artist {
 export interface Option {
   type?: string;
   label?: string;
-  action?: () => void;
+  action: () => void;
   children?: Option[] | false;
   icon?: string;
   critical?: Boolean;