Fix some cases where the DefaultMessageArea would emit an exception when adding text
Ensure that the adding of text on the DefaultMessageArea is always performed on the swing event thread
Add a setTimedMessage(String, int) method on the StatusBar
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Fix some cases where the DefaultMessageArea would emit an exception when adding text
Ensure that the adding of text on the DefaultMessageArea is always performed on the swing event thread
Add a setTimedMessage(String, int) method on the StatusBar