model runs: add some missing copyright notices
review tab: try to keep a run of the same model when closing current run
review tab: properly handle user cancel exceptions
Merge remote-tracking branch 'origin/master' into modelruns

Conflicts:
	headless/src/main/org/nlogo/drawing/package.scala
	headless/src/main/org/nlogo/mirror/ModelRun.scala
	headless/src/main/org/nlogo/mirror/ModelRunIO.scala
	src/main/org/nlogo/review/ReviewTab.scala