Add a system property for suppressing the console

Note that this change does not enforce compliance, but merely exposes
a property constant for use in downstream console implementations.

Some use cases produces a mountainous torrent of output to
System.(err|out), and the graphical console cannot keep up.

While I would argue that these use cases should be altered to use the
LogService at appropriate logging levels, it is still nice to have a
way to disable the graphical console to sidestep such problems.

However, we don't want to make it too easy for naive users to disable
the graphical console -- otherwise we will be back to where we started
with people reporting "silent failure" bugs because the associated
output was suppressed.

Author: ctrueden

src/main/java/org/scijava/ui/console/ConsolePane.java

@@ -42,6 +42,9 @@
  */
 public interface ConsolePane<C> extends UIComponent<C>, OutputListener {
 
+	/** System property which, if set, suppresses the SciJava console window. */
+	String NO_CONSOLE_PROPERTY = "scijava.noConsole";
+
 	/** Appends the given output to the console. */
 	void append(OutputEvent event);