[FL-1968] Pin code locking (#788)

* Gui: code input module
* Gui: fix size to fit frame
* Desktop: PIN config and lock option
* Gui: code input: cleanup, offset input fields if no header present
* Desktop: move code unlock to desktop_locked scene
* Desktop: fix unlock with back key
* Desktop: bump settings version
* Desktop: correct scene usage.

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

applications/desktop/desktop_settings/desktop_settings.h

@@ -3,11 +3,20 @@
 #include <stdint.h>
 #include <stdbool.h>
 
-#define DESKTOP_SETTINGS_VER (0)
+#define DESKTOP_SETTINGS_VER (1)
+#define PIN_MAX_LENGTH 12
+
+typedef struct {
+    uint8_t length;
+    uint8_t data[PIN_MAX_LENGTH];
+} PinCode;
 
 typedef struct {
     uint8_t version;
     uint16_t favorite;
+
+    PinCode pincode;
+    bool locked;
 } DesktopSettings;
 
 bool desktop_settings_load(DesktopSettings* desktop_settings);