[web/js] replace callAddOrDeleteThenReload with more generic callAjaxFuncThenReload
That's going to be a more useful replacement for callUserCallbackThenReload.
Closes #4178566.
usr/lib/PY_VERSION/*-packages/cubicweb/entities/
usr/lib/PY_VERSION/*-packages/cubicweb/ext/
usr/share/cubicweb/cubes/
usr/lib/PY_VERSION/*-packages/cubicweb/*.py