CRAFTERCMS-543: Prevents previewing a non previewable page

Save and Close option was refreshing the main window and redirecting to
preview although the previewable property of the form was false
Allows saving from ICE

Fixes bug introduced by 5f0908ba3d2c606313f07ca65307344cffe44cfe
where the form sections (except for the ICE section) were not being
saved into the xml
Merge remote-tracking branch 'david/master' into 2.3.x