Open multiple files.
Raise exception when file is already opened.
Better handling of multiple exceptions.
Improve open pattern.
Allow multiple open from drop.
Fix command line open.
Ensures that thread is deleted.
Do not open if no files are given.
Implement multiple closing.
Make open as other menu operation.
Add close all action.
Update logging debug.
Fix import.
Use same pattern as open for import.
Add reload of several files.
Fix close and reload even if root data file item is not selected in
tree.
Fix problem of exception not showing up.
Fix problem that condition were being removed from data conditons after
modifications. This was occuring because new condition were being
created on edit. This bug fix changes all the condition widget to allow
exisiting condition objects to be modified instead of creating a new
object after each modification.
Remove unused case.
Fix new datafile.
Improve about dialog.