HGBase Code (Desktop)

Added a functional interface for a consumer which accepts three arguments.

Utility method to check if a value is in a list of possible values.

Removed code smells.

Reformatted code.

Method to pick a random element from an array.

Enumeration for possible mouse click actions a user can do.

Supplier for the size of string in pixels.

Utility method to convert a size specified in pixels to a corresponding font size in points.

Handle IllegalArgumentException when reading an XML file.

Method to get an attribute as boolean and returns a default value if the attribute was not specified.