[Cooker] diskdrake - resize mounted partition

[Borsenkow Andrej]

When I tried to resize partition that was mounted diskdrake did nothing 
(meaning, it did not resize file system) but it still suggested to write 
new partition table. It means, that in most cases file system is lost. 
It should at least warn me that *file*system* was not resized correctly 
(better yet, refuse to do anything with mounted partition).

-andrej