Allow update resources after file upload from external ssd

[Rak Arthus]

Hi,

Several times I load a document and realize that some resources are linked from external ssd.

Strangely, Affinity detects all external resources by notifying me as soon as connect the external ssd, but the images/photos are not actualised and are therefore not displayed.  

Also, if I click on "integrate" and after to "link" (in ressource manager window) the resource load correctly, but I need to do that for each ressource. It's not possible to use this solution.

Either this is a bug, or Affinity has not been designed to update itself in the background after the document has been loaded.