New: export graph to image (PNG)
New: use tab and arrow keys to navigate, enter and escape to open and close anywhere and everywhere (except logout button)
New: enter and escape now also save and cancel detailviews

To do: location picker for graph image export
Added close buttons to help, not (yet) escape/enter key responsive
Added some more Graph magic
Improved the Graph export a bit
Disabled the Exit button's 'tabbing'
Lots of other things...

To do: fix the key actions for help & luggageListView + FileChooser for Graph export