Put the loading indicator into center of the window
Preparing virtual machines first and then everything else to help placement
Changed the link statistics link from opening in a new tab to a jquery dialog.
Fixed
The upload button will now be disabled till a file was selected.
Little Style fixe.
Merge pull request #624 from swuest/physical_link_stat_window

Physical link stats will now opened in a jquery window.
Merge pull request #622 from swuest/upload_dialogs

Disabled upload button after click and added loading indicator
Merge pull request #621 from dswd/two-step-prepare

Preparing virtual machines first and then everything else to help placement