Output window disappears

[martinwahlberg]

When I start a rendering and leave my computer for a while and the render finishes I notice that the output window or frame buffer or whatever you call it is closed. Is that configurable? Or is it a bug?
Is there a way to bring that last render up again in that output window to add effects like bloom or CA at a later stage?
Also while I'm at it, it would be great if that same window remembered my last settings used for bloom and CA.
One last thing, why is there no on/off checkbox for CA when there is one for Bloom?