Don't call loadGame() from within the MWMechanics::Actors update sequence
Savegame dialog: support loading saves using Enter key or double-click
Don't add duplicate topic responses to the journal
Feature #764: Store the actor that gave the dialog response
Some additional safety checks for global map loading
Savegame dialog: 'Enter' while editing a name is equivalent to pressing the ok button
Savegame dialog: Don't allow empty save names
Overwriting saves fixes - copy description of overwritten slot, ask for confirmation
Savegame dialog: Set key focus to editbox