src/clfswm-internal.lisp (place-frames-from-xinerama-infos): handle better no xinerama support case.

src/clfswm.lisp (main-mode: configuer request): Call *root-size-change* hook on each root size change. This let CLFSWM refresh background wallpaper on root size changes.

src/clfswm-internal.lisp (place-frames-from-xinerama-infos): Handle root screen resize on the fly when adding or removing a monitor.

src/clfswm-menu.lisp (open-menu): Show key bindings correspondence in menu for main and second mode.

src/xlib-util.lisp (handle-event): Ignore synchronous xlib window-error and drawable-error in event handler. contrib/clfswm: Dump different image from different installation path.

src/clfswm.lisp (configure-request handler): Send a configuration notify event in a more precise way.

src/xlib-util.lisp (with-xlib-protect): Limit X errors ignored to prevent freezes and add a backtrace system.

src/clfswm.lisp (configure-request handler): To be ICCCM compliant, send a fake configuration notify event only when the window has moved and not when it has been resized.

src/clfswm-internal.lisp (delete-child-and-children-in-all-frames): Remove all children in frames and only close windows.

contrib/toolbar.lisp (toolbar-adjust-root-size): Takes care of multiple toolbar on the same root edge.

src/clfswm-internal.lisp (show-all-children): (show-all-children): Let the choice to always display children or to optimize by hidding children not seen . The first option is better with transparency support (frames behind orther frames are seen). The second one is faster with many children in the same frame (not seen children are not displayed).