In "Select annotators" dialog, annotators should be selected via tickboxes instead of arrows. Summary window should show the selected annotators. Two new functions are needed: - a tickbox "Apply to all in subtree" (annotators are set in all the children of this node) - a dropdown menu "Copy from", listing all nodes with non-zero annotators (annotators are copied from the selected node) The window for the selection of annotators should be a popup dialog, or it should follow the scroll down in the tree. Currently it stays up, so selection of annotators for reactions is cumbersome.