cubicweb-preview #5313815 Preview in new tab is broken [resolved]

The preview controller must send string instead of unicode

prioritynormal
typebug
done in1.1.2
load0.300
load left0.000
closed by#456586709212 [controller] if opened in a new tab, the PreviewController must send string instead of unicode (closes #5313815)
patch[controller] if opened in a new tab, the PreviewController must send string instead of unicode (closes #5313815) [applied]