Implements vote weight in client
The user detail page has a new property
change deserialize to parse floats
change "yes"-voting to send "Y" and "0" instead of "1" and "0"
add vote weight to user list, filter, sort
add vote weight to single voting result
votesvalid and votescast respect the individual vote weight
fix parse-poll pipe and null in pdf
adds a "is present" toggle to the user menu
Refactor user menu into own component
Add a config variable to determine if the user is allowed
to set themselve as present
- use always color black on projector, also in dark mode
- show border for projector preview
- Fix projector logo margin by using img instead of os-logo
- Use also 'username' in invitation email subject
* Add is_present field for csv import of users.
* Refactor JS functions get_full_name and get_short_name (Fixes#2136).
- Show participant number in get_full_name() output.
- Sort users by first or last name.
- Extend config option to sort users.
- Mark unused Python methods get_short_name and get_full_name.
