interface since no engine uses of Control will ever call these methods. The functionality is still left in AbstractControl which makes more sense since it is up to the control implementation to enable or disable itself as it sees fit. git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9268 75d07b2b-3a1a-0410-a2c5-0572b91ccdca