"b" + "r" now changed to 'b' + 'w'. It's more straight-forward, and may cause perfomance improvements - character primitives allocation is faster and less expensive than string creation.
I used Intellij IDEA to automatically refactor code to achive 3 goals.
1) get rid of anonymouse classes, and replace the with lamba to get more readeable and clean code (like in TableWaitingDialog).
2) make effectively final variables actually final to avoid inadvertent changes on it in further releases and keep objects as immutable, as possible.
3) Get rid of unused imports (most of the changes) in whole project classes.
