Recompute the header toolbar widget sizes when the splitters are moving (generic binding to a given widget resize event).

git-svn-id: https://ajaxplorer.svn.sourceforge.net/svnroot/ajaxplorer/trunk@3395 3bf36de4-da32-0410-8312-848cfbfe3f7d
Fix goTo function broken for Root node

git-svn-id: https://ajaxplorer.svn.sourceforge.net/svnroot/ajaxplorer/trunk@3396 3bf36de4-da32-0410-8312-848cfbfe3f7d