More UI fixes and improvements (#2419)

* Unify spelling of confirm exit/retry across apps.
* Unify infrared exit/retry confirm menus?
* "Keyboard Layout", not "Keyboard layout".
* Make iButton read scene prompt less awkward.
* "Detect Reader" in MF Classic saved menu instead of "Detect reader"
* NFC menu spelling changes only.
* Remove \n in strings in widget_add_string_element() calls.

Co-authored-by: あく <alleteam@gmail.com>

applications/main/bad_usb/scenes/bad_usb_scene_config.c

@@ -17,7 +17,7 @@ void bad_usb_scene_config_on_enter(void* context) {
 
     submenu_add_item(
         submenu,
-        "Keyboard layout",
+        "Keyboard Layout",
         SubmenuIndexKeyboardLayout,
         bad_usb_scene_config_submenu_callback,
         bad_usb);