Aliases and merging of correspondents

Description I would like to be able to easily merge different correspondents into one and create aliases for a correspondent. Some example cases where this could be useful: • A correspondent may change its name over time (e.g. a company). It would be desirable if we could keep both the old and new name, but as a single correspondent entity • There may be different variants of a name, such as a full name, an abbreviated name or a name with additions such as a legal form (Inc, Ltd., GmbH etc.). Instead of managing all of that, have them as aliases. • If correspondents and documents are created automatically from e-mails, sometimes the sender changes its name or e-mail address, causing a new correspondent to be created. It would be better if it could be matched against one of the aliases The feature request would be the following: • In the correspondents overview, add a button to merge multiple selected correspondents into a single one. A main cor…