Update issue #170 : Tooltips - prevent tooltips deactivating if mouse stays stationary.

git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@264 c2f33eb2-41b2-391d-4cb4-d9d0608729ba
Increased version number from 0.6.0.x to 0.6.1.x

git-svn-id: http://graph-studio-next.googlecode.com/svn/trunk@265 c2f33eb2-41b2-391d-4cb4-d9d0608729ba