fixed bugs with colormaps and shaders menu :
- colors being overriden on other shader select
- colormap save and load formats and reading
- Grid not updating on shader change
[A venir] Mise en place de quotas sur nos instances GitLab. Plus d'information sur : https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565
[Coming soon] Quotas installation on our GitLab instances. More information: https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565