Fixed bug 439118: LaunchConfigurationTabGroupViewer marks 'revert' as disabled when canSave() is false

Signed-off-by: Sarika Sinha <sarika.sinha@in.ibm.com>
Fixed bug 80089: [preferences] Allow to configure annotation
presentation layer

Increased presentation layer of breakpoints to 7 to bring them on top of
warnings in the vertical and overview rulers.

Signed-off-by: Timo Kinnunen <timo.kinnunen@gmail.com>