IDE: anchor editor: update when becoming visible again, bug 26558

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46022 4005530d-fff6-0310-9dd1-cebe43e6787f
editortoolbar: disconnect references when source window is destroyed

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@46023 4005530d-fff6-0310-9dd1-cebe43e6787f