Also includes misc fixes
* Use CSS modules for all the CSS.
* Fix a bug in the filterbar which was not filtering anything.
* Fix a l10n issue in songs view.
* Update hook to clean build repo before running, preventing to push
dev built code.
* Update webpack build code.
When not setting an endpoint protocol scheme at login, "http" was
assumed. Changing this to the same protocol as current one, to avoid
mixed blocked content.
Also prevent multiple submissions of LoginForm.
