Use the same shell size as on C64.

* Wide enough to be useful...
diff --git a/contiki-cpc/apps/shell.c b/contiki-cpc/apps/shell.c
index 1575708..450c638 100644
--- a/contiki-cpc/apps/shell.c
+++ b/contiki-cpc/apps/shell.c
@@ -273,9 +273,10 @@
 	cfs_closedir(&dir);
 	showingdir = 0;
 	inttostr(size, totsize);
-	shell_output("Total number of blocks: ", size);
+	shell_output("Total number of blocks:", size);
 	shell_prompt("contiki-c64> ");
       } else {
+		  dirent.size >>= 10;
 	totsize += dirent.size;
 	inttostr(size, dirent.size);
 	shell_output(size, dirent.name);
diff --git a/contiki-cpc/conf/shell-gui-conf.h b/contiki-cpc/conf/shell-gui-conf.h
index 235b1c6..6d4758b 100644
--- a/contiki-cpc/conf/shell-gui-conf.h
+++ b/contiki-cpc/conf/shell-gui-conf.h
@@ -1,2 +1,2 @@
-#define SHELL_GUI_CONF_XSIZE 20
-#define SHELL_GUI_CONF_YSIZE 20
+#define SHELL_GUI_CONF_XSIZE 26
+#define SHELL_GUI_CONF_YSIZE 12