Drag-and-drop of toolbar actions is a nice feature that currently is
basically hidden to end users. The only way to enable it is to open the
"Configure Toolbars" dialog (!). Some applications (e.g. Kate) open the
dialog as modal, so there is no way at all to use this feature in such
This patch implements a global 'edit mode' (that can be enabled via
context menu) in which the user can move the whole toolbar or drag the
actions within the toolbar.