Signal: connection improvements, non-const invoke optimization
Signal: connection improvements, non-const invoke optimization

niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina,niello/deusexmachina