Merging changes of r15415. Fixing npe when hiding tool tip.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15416 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Merging changes of r15417. Do not allow to get popup info to get out of display.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15418 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Moving graph split method to seq map view.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15419 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Removing unintended commit.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@15420 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Merge remote-tracking branch 'upstream'