Make plot unicode method fail gracefully
Make plot unicode method fail gracefully

plot unicode methods will now show incomplete information instead of
raising an exception when referenced fields are null.

RickMohr/otm-core,clever-crow-consulting/otm-core,RickMohr/otm-core,maurizi/otm-core,maurizi/otm-core,recklessromeo/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,recklessromeo/otm-core,maurizi/otm-core,clever-crow-consulting/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,recklessromeo/otm-core,RickMohr/otm-core