Created attachment 610038 [details]
logs

Description of problem:

export of vm's that have no template in the export domain will issue a warning which we need to press OK on to continue with the export. 
but it seems as if the dialogue does not respond for several minutes since pressing ok does nothing (I pressed OK several times and nothing happens). 

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

si17

How reproducible:

100%

Steps to Reproduce:
1. create 20 thin provision vm's
2. export the vm's without exporting the template first
3.
  
Actual results:

a warning dialogue appears -> press ok -> nothing happens for several minutes even when you press ok several times. 

Expected results:

dialogues should close right away and the export should start

Additional info:backed log (just in case)