Allow mass update of 'Product Version' field

Implement an option to update the 'Product Version' field for multiple
bugs at once in view.php, similar to existing options for 'Target' and
'Fixed in' version fields.

Signed-off-by: Damien Regad <dregad@mantisbt.org>

Matt's original commit was ported to master branch and modified to add a
missing e-mail notification (e28272287a33a80642b8a7cb50d4d2111aa3ef1a).

Fixes #11802
Version list now contains ALL_VERSIONS

Previously, behavior of new mass-update option was the same as
UP_TARGET_VERSION, i.e. version list was limited to future version.
Coding guidelines
Use existing BugData object instead of bug_get_field()
Allow mass update of 'Product Version' field

Fixes #11802, pull request #331