elm_fileselector: use a sane item size

16 px is nothing you can really read, even the font is bigger than that,
so you only see "...", like
http://www.enlightenment.org/ss/e-592478d86028f5.91073806.jpg.

Now it looks like:
http://www.enlightenment.org/ss/e-592479ac4dde13.60227000.png

@fix

src/lib/elementary/elc_fileselector.c

@@ -25,7 +25,7 @@
 #define MY_CLASS_NAME_LEGACY "elm_fileselector"
 
 /* FIXME: need a way to find a gap between the size of item and thumbnail */
-#define ITEM_SIZE_DEFAULT 16
+#define ITEM_SIZE_DEFAULT 70
 
 typedef struct _Legacy_Event_Path_Then_Data
 {