Patches for "Allowable drives" in the Partition editor (641910)

[Ales Kozumplik <akozumpl redhat com>]

Hi,

This follows up on what tmlcoch started and didn't have the time to finish:
https://www.redhat.com/archives/anaconda-devel-list/2010-October/msg00326.html

What the user wanted in the BZ is not having all the existing devices 
preselected when creating a new RAID partition. What Tomas did in his 
patches (what now has become the first patch in this set) was adding a 
header fields in the checklist, clicking the left one selects/unselects 
all (like in the filterting UI). Notice that I am also making the whole 
window taller since the column headers are taking extra space:

http://akozumpl.fedorapeople.org/select_all_button.png

The second patch goes even further and really does not select all the 
items when a new RAID partition is to be created (for regular partitions 
it still selects all devices, i.e. leaves it to anaconda to choose what 
disk to put it on):

http://akozumpl.fedorapeople.org/new_raid_partition.png

Ales