check backend kwargs in reuse condition in ETermBase.set_backend()
check backend kwargs in reuse condition in ETermBase.set_backend()

BubuLK/sfepy,rc/sfepy,sfepy/sfepy,BubuLK/sfepy,rc/sfepy,BubuLK/sfepy,vlukes/sfepy,sfepy/sfepy,rc/sfepy,sfepy/sfepy,vlukes/sfepy,vlukes/sfepy