Bug Fixes - Fluid Topics - 5.2

Fixes an issue where the Email sending method configuration would change from the Configure SPF and DKIM for the internal mail server option to the Use the internal mail server option.

Fixes an issue where some badly field request would return a 500 error instead of an explicit 400.

Fixes an issue where some floating elements would not be properly positioned in Design menus.

Fixes an issue where the Import configuration feature would sometimes fail unexpectedly.

Fixes an issue where requesting a not-existing sub-sitemap would return a 500 error instead of 404. 

Fixes an issue where some malformed requests would return a 500 error instead of 400.

Changes TinyMCE dependence version's to 6.8.6.

Fixes an issue where an API key's last usage date would not be updated.