Sorting scroll fix

 - Took the best of Panu's work and combined with the existing RelatedProposalsLoader API to solve the sorting and scroll issue.

 - Fixed screen update issues after new votes arrive.

 - Cleans up overflow visible issues

 - Removes Sort_by $location feature, as this is not really practical or needed, as Panu pointed out.

 - Greatly simplifies the RelatedProposal controller

 - Moves old proposals.js file to archive