Dashboard

* Replacing String literal can with character literal.

* Equality test with boolean literal: false

* A class that is not serializable declares a method named serialVersionUID.

* Cannot compare strings using the not equals (!= or ==) operator.

* Long literals should use "L" for a suffix.

* Avoiding extra math at ThreadPoolManager for each task.

* Removed unnecessary casting to super-classes.

* Fixing logic in many equals(Object) methods.

* Removed unnecessary overridden method.

* Even when try-catch may be faster, we need our users to know where they mistaken sending a message with some info.

* Closing #6176

* Client and server packet fixes.

* Equality with literal boolean.

* Using charAt(0) rather than startWith(..) for a single character.

* Removing unused import.

* Quest class:

* Comparing strings with equals(String) rather than ==.

* Classes from actor package:

* Setting _firstCommandChannelAttacked as volatile to make double locking check work properly.

* Equality with literal boolean.

* Avoiding "this instanceof", where it's possible.