Show the character name in the savegame details

The way the multi-character saves work in OpenMW has some problems, and one of the most annoying problems is:

• If you accidentally move the character A's latest modified save to character B's saves folder; it changes the whole saves folder for B in-game to A's name (if that save has the latest modified time in general).

• You can have multiple character saves in one folder and you won't tell which is which because the character name is not displayed in the details.

A suggested fix "for now" is to show the character name in the save details.