Saving and loading
The save and load features can be accessed via the ingame menu.
The save dialog has to provide a possibility to enter a name for the save game and should display other saved games, so that they can be selected and overwritten.
Similarly to the save dialog, the load dialog displays all saved games. The user can select one and load it via a click on a confirm button.
There are three types of savegames: autosave (automatic saves every n minutes), quicksave (saved by hotkey) and regular saves (saved via the save dialog in ingame menu). Everyone of those has it's own directory, which makes them easy to distinguish. In the load dialog, all of them are displayed.
