cubicweb #2093183 extractSortValue() js method should fallback on cell content [validation pending]

When a colrenderer declares a column sortable, the cubicweb.sortValueExtraction() is used as the sort key function. This function looks for a cubicweb:sortvalue attribute in the corresponding td. If the attribute is not found, the fallback sort key is an empty string. It should be the cell text content instead.

prioritynormal
typebug
appeared in3.14.0
done in3.15.0
load0.100
load left0.000
closed by#8133:2dedcc15208d