HGBase Code (Desktop)

Add some functionality for menu.

Add utility methods.

Extend playing field editor.

Add implementation of pair and null-safe hashCode utility method.

Fix problem with radio button in menu and toolbar.

Removed unnecessary SuppressWarnings.

Fix problem when creating a new track.

Functionality improvement for HGBase.

This commit was manufactured by cvs2svn to create tag 'v_100'.

Update version.