Put defines into an enum class and use typed_flags template from o3tl
to give them flag operators.

There were some shift operations to apply flags from start references
to end references, these went into a helper in address.hxx to hide
them. A marco with shift operations in address.cxx was rewritten in two
helpers without shifts.
One shift remained in ScRange::Format with a comment.

The other flag untypical operator was a minus 1 in a helper for
ScRefFinder::ToggleRel, which iteratates through all possible
combinations for absolute references. This is used to make referecnces
absolute via SHIFT+F4. A replacement would be too complex.

Change-Id: I4850f1623e01e56c60ac2260b95fc5cad8b6fd71
Signed-off-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>
Reviewed-on: https://gerrit.libreoffice.org/22840Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>