Refreshing the assignement tool can lead to empty assignement grid.

This happens when the assignement context does not change.

How to reproduce :

• Select a page in the sitemap tool
• open the assignement tool
• refresh (without selecting a page in the assignement tool or after selecting a page again in the sitemap tool)
• > The assignement grid is now empty

• Open an assignement tool restricted to one context (queries directory, forms,…)
• select any element as context
• refresh the tool
• > the assignement grid is now empty