webadmin: configure local storage - fixed path style

Fixed path style in configure local storage dialog:
the label and the editor are now aligned
(instead of a separate label, used the one
inside EntityModelTextBoxEditor).

Change-Id: I13a52112cbc7b80eb56617412af2f1364f38b1cc
Bug-Url: https://bugzilla.redhat.com/996931
Signed-off-by: Daniel Erez <derez@redhat.com>