Quick reference for shortcuts

[Iago París]

Create a quick and easy to find reference for shortcuts, which would be very useful to know Ctrl+Alt+click on node

Something like the shortcut on the right of the menu buttons.

Or a written non-editable list on the "Help" menu from the toolbar if the first is not possible.

[Jorge Pérez]

Start making a wiki page with all the shortcuts. When completed we could make a new item in help menu.

[Iago París]

Wiki page and menu item added