• added Untangle button in Graph tab (it will cycle through different layouts)
• added configuration for above in version number menu (clients in a row, cycle order)
• improved selected cables highlight in Graph tab
• added keyboard shortcuts for hide and split/unsplit
• added 'Save current layout' in graph canvas context menu (graph layout is stored at exit so this can be used to save it before using Untangle button; the button will cycle back to saved layout)