[FL-2121] U2F GUI (#942)

* U2F: new gui
* U2F: user cert key encryption
* FuriCore: move type casting to dangerous_defines
* FuriCore: exclude dangerous things from furi.h

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

applications/u2f/views/u2f_view.h

@@ -6,9 +6,11 @@ typedef struct U2fView U2fView;
 typedef void (*U2fOkCallback)(InputType type, void* context);
 
 typedef enum {
-    U2fMsgNone,
+    U2fMsgNotConnected,
+    U2fMsgIdle,
     U2fMsgRegister,
     U2fMsgAuth,
+    U2fMsgSuccess,
     U2fMsgError,
 } U2fViewMsg;