E_showPrompt_Q3: allow long press actions

as proposed at espruino/BangleApps#3915 (comment)

Author: thyttan

libs/js/banglejs/E_showPrompt_Q3.js

@@ -64,6 +64,9 @@
           draw(i); // highlighted button
           g.flip(); // write to screen
           E.showPrompt(); // remove
+          if (e.type===2 /*long press*/ && options.buttonsLong && options.buttonsLong[btns[i]]) {
+            resolve(options.buttonsLong[btns[i]]);
+          }
           resolve(options.buttons[btns[i]]);
         }
       });
@@ -76,4 +79,4 @@
     };
     Bangle.setUI(ui);
   });
-})
+})