means the PartWidget doesn't need to know its PartTableWidget anymore.
Don't keep a list of child widgets, Qt will do that for us.
Remove the showChildren param and property from PartWidget, it wasn't used
anymore.
Rename active() to isActive() in PartWidget for consistency.
svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=1114033
not. Partition widgets that have children need to have the minium width
dynamically calculated.
svn path=/trunk/extragear/sysadmin/partitionmanager/; revision=907517