Llittle code formatting changes and warn user when maximum is reached
Remove not longer used code/comments
Tiny little detail but marking the selection as checked actually allows voting to occur
Code layout and cleanning
Actually checks if user has selected anything before voting.
After voting redirect either to the election page or the vote page is user can still vote

Remove information message about not beeing allowed to vote anymore as this page is only
shown afterward.
Simplifies the return after voting since the election overview handles redirection to voting page
If user has already voted, remove previous choice from selection
Use attr instead of prop and refactor some code in the JS
Finally get the voting mechanism straight

Do not disable the checkbox or the form will not return anything, rather, do not check the box
if user has already reached the maximum.