cubicweb-inlinedit #2845110 js: fix .loadxhtml calls [validation pending]

As of toda, some of these calls are meant to reload the 'reledit' view, but the reloading actually happens within the toplevel div (rather than replacing it).

prioritynormal
typebug
done in1.0.2
load0.100
load left0.000
closed by#4d3a4fa39600 [js] do replace the target div while reloading it (closes #2845110)
patch[js] do replace the target div while reloading it (closes #2845110) [applied]