Added reload_directory() to plugin api and modified text editor and sudoku plugins to call it when saving a new file. Fixes B#5360.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10053 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/sudoku/sudoku.c

@@ -689,6 +689,7 @@ bool save_sudoku(struct sudoku_state_t* state)
         /* Add a blank line at end */
         rb->write(fd,"\r\n",2);
         rb->close(fd);
+        rb->reload_directory();
         /* Save a copy of the saved state - so we can reload without
            using the disk */
         rb->memcpy(state->savedboard,state->currentboard,81);