Fix bug with loading old bline
Fix loading old group origin
Sound in preview
Fix color widget
Fix other colors
Enable alternative editing mode by Ctrl key instead Space.
Fix key-frames moving
Fix transformation duck
Fix color again
Fix 555 - Current Time in Canvas Window color not updated when acting on keyframe

* Inform that something has changed about the current time for both
add/remove/change a keyframe by firing canvas_interface::signal_time_changed
Print jobs thrown out to standard error output