Merge pull request #4 from andresamayadiaz/BR-3-rev

Enable sort table by back-end to solve problem with pagination
Merge pull request #5 from andresamayadiaz/BR-4

 Check Invoice Upload
Fix progress bar confusion between old_upload and drag_and_drop
Merge pull request #6 from andresamayadiaz/BR-4-rev

Fix progress bar confusion between old_upload and drag_and_drop
Fix minor problem: never ending progress bar, frozen Elegir Archivos button
Merge branch 'master' into BR-5