LOW / fix openflexo-885
RESOLVED - issue OPENFLEXO-864: Hibernate error in connecting with the
server  https://bugs.openflexo.com/browse/OPENFLEXO-864

ProgressWindow could possibly be set to visible againg but with a null
instance, causing hideProgressWindow to do nothing and keep a progress
window displayed. 
Conflicts:

	flexodesktop/GUI/flexo/src/main/java/org/openflexo/module/ProjectLoader.java
Merge branch '1.6.0' of ssh://git@github.com/agilebirds/openflexo.git into 1.6.0
Merge branch '1.6', remote-tracking branch 'github/1.6.0' into 1.6