IDEA-123160 Find Usages doing nothing in 13.1: do not throw exception in production.
IDEA-123160 Find Usages doing nothing in 13.1: do not throw exception in production.
distraction free mode improvement: don't blink during editor switching
cleanup — notnull
show execution point for VM script file and http files
external system: add check for disposed application before  document save handling
External project notification: code cleanup + added message counter methods