Merge branch 'DMPRoadmap-master' into dmpopidor_branding

Added data cleanup rules based on errors got from data validation

Changes following migrations

Fix on mixins calls in helpers & models

Separated core code from ours improvements for the new visibility

Merged with DMPRoadmap:master

Changes to Gemfile for PostgreSQL migration

Fix to V2.1.0 rake task upgrade

Removed Download Plans button

Funders should not appear in create account form and profile edit

Fix to french translation

Should display the correct org name if the user is linked to the other organisation

Removed import of font face from googlefonts

(Test) Moved tooltip below inputs

Removed Beta tag & put new plan creation form as default

Solved bug where org field was not marked as required

New (temp) logo and some css improvements in footer

Default template name is now more visible in plan form

Plan title is now used when choosing the default template

Improved default template name display

New CNRS logo to integrate

Added icon to indicate the state of the example answer

Changed plan creation flow & texts

Removed warning label in notifications

combobox content of the first tab should hide when clicking on funder tab

Changed some of the text on the new plan creation form

Put 'DMP OPIDoR' as title for the homepage

Removed console.log

Added slug to themes & theme API now uses slug

Merge pull request #2026 from DMPRoadmap/fix-rake-task ...

Fix upgrade rake task