cubicweb #2405249 [tabs] url parameters handling conflict [validation pending]

when constructing the url callback for any tab content, we now copy the request form into it; this can lead to param overloading (such as eid/rql being present at the same time)

prioritynormal
typebug
done in3.15.2
load0.100
load left0.000
closed by#202625f247b4 [views/tabs] fix rql/eid param conflict when either one is already in the request form (closes #2405249)