Description of problem:
When a target iqn is too long to fit in the dialog box, there is no way to extend or scroll to the end of the iqn, in order to see the actual target name

Version-Release number of selected component (if applicable):
si15

How reproducible:
always

Steps to Reproduce:
1. set up a long iqn
2.try to add a new SD
3.
  
Actual results:
iqn only partially visible, so if there are several targets on the same host, it's impossible to distinguish between the discovered targets

Expected results:
be able to wide the visible field or of the text is too long, provide a scroll bar

Additional info: