[FL-1108] iButton fix navigation (#404)

* file_select: process zero file counter
* file_select: process file select view for less than 4 files
* ibutton: change application navigation
* ibutton: add read new key submenu
* file_select: use standart MIN() function
* sd-filesystem: remove unused min() define

applications/sd-filesystem/sd-filesystem.h

@@ -11,10 +11,6 @@
 #define SD_FS_MAX_FILES _FS_LOCK
 #define SD_STATE_LINES_COUNT 6
 
-#ifndef min
-#define min(a, b) (((a) < (b)) ? (a) : (b))
-#endif
-
 /* api data */
 typedef FIL SDFile;
 typedef DIR SDDir;