Add possibility for customizing password generator

It would be great, if one could modify the special characters in the password generator to own needs, see for example the feature from KeepassXC:

Currently, one can just enable special charaters, which include $ % and ^ as well. Those characters might cause issues on some (especially older) systems, so one has to remove/adapt them by hand, if not wanted.

A post was merged into an existing topic: Filter special characters in generated passwords per login