Update color scheme definition and some codestyle enhancements

web/app/services/__init__.py

web/app/services/forms.py

web/app/services/views.py

web/app/static/css/material_icons.css

web/app/static/css/materialize.sticky-footer.css

web/app/static/css/nopaque.css

web/app/static/css/nopaque_icons.css

web/app/static/css/sidenav_fixed.css

web/app/static/js/nopaque/RessourceLists/CorpusList.js

web/app/static/js/nopaque/RessourceLists/JobList.js

web/app/templates/_color.html.j2

web/app/templates/_colors.html.j2

web/app/templates/admin/edit_user.html.j2

web/app/templates/auth/login.html.j2

web/app/templates/auth/register.html.j2

web/app/templates/auth/reset_password.html.j2

web/app/templates/auth/reset_password_request.html.j2

web/app/templates/corpora/add_corpus.html.j2

web/app/templates/corpora/add_corpus_file.html.j2

web/app/templates/corpora/analyse_corpus.html.j2