[FL-1061] iButton save and load from sd card (#394)

* SD App: fix queue adresses
* sd-filesystem: fix making path on file select event
* ibutton: add key reading from sd card
* ibutton: save ibutton key to sd card
* ibutton: add deleting keys from sd card
* ibutton: remove KeyStore from application
* ibutton: make directory if necessary on key save

Co-authored-by: DrZlo13 <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

applications/ibutton/ibutton-key.h

@@ -16,19 +16,6 @@ public:
     void set_type(iButtonKeyType key_type);
     iButtonKeyType get_key_type();
 
-    // temporary constructor for KeyStore mockup
-    iButtonKey(
-        iButtonKeyType type,
-        const char* name,
-        uint8_t d0,
-        uint8_t d1,
-        uint8_t d2,
-        uint8_t d3,
-        uint8_t d4,
-        uint8_t d5,
-        uint8_t d6,
-        uint8_t d7);
-
     iButtonKey();
 
 private: