Localisation updates from http://translatewiki.net.
Refactor signup form to remove tables
Refactor contributor terms using new form styles
Remove tables from login form
Standardize forms between login and new
Remove tables from user settings page
Remove table from diary edit and refactor using new form styles
Remove tables from lost password form
Remove tables from trace upload form
Fix search icon width
Fix unclosed labels in account details
Fix export submit pad
Fix buttons in the richtext help panel
Rework send message form using new form styles
Make more use of SCSS nesting
Parameterise font sizes

Extract font size and line height as parameters and replace many
spacing values with multiples of the line height parameter.
Parametrise various colors
Make the export bar less ugly
Remove tables from password reset form
Make the account image form less ugly