Remember some settings for election administration

[felagund]

For a given administrator, these three setings for each election do not presumably change much

a) Public name
b) Languages
c) Contact

Ideally, the system would just remember them and prefill them from a previous election.

Alternatively, there could be an option to clone an election or with each of these, there would be a button "copy from last election".

The same could be done for "Name and description of the vote", which does change every election, but sometimes just slightly (imagine multiple rounds of the same election, for example).

I suggested these a year ago here: https://sympa.inria.fr/sympa/arc/belenios-discuss/2021-01/msg00010.html

but I guess here they will not be as easily forgotten and I can see in other issues that a new admin interface is planned.