Review save settings method.
Specify original object

This should be handled using the pojo objects (breaking change).
To be replaced on develop.
Generate thumbnail for user w/o thumbnail and w/ settings.
Check that settings owner equals session owner.
Create a new thumbnail if none associated to rnd settings.
Re-load rendering engine after save as.
Return a copy of the settings to viewer.
Reload settings.
Updated header.
Merge pull request #24 from jburel/12145-rnd-settings

12145 rnd settings