BibEdit: wrongly displayed HP changeset bug

• Fixes bug triggered When switching from table to marc view where cache was created again without adding information about the disabled_hp_entries. As a result when record was retrieved again all HP changesets were displayed as non applied.

• Saves gDisabledHpEntries to the cache, when changing from marc to table view.

• Displays a message when user has applied a HP changeset, has not taken action for all changes and tries to switch to marc view.

Reviewed-by: Javier Martin Montull <javier.martin.montull@cern.ch>
Tested-by: Samuele Kaplun <samuele.kaplun@cern.ch>