Fixed a bug where the editor would exit because of a boost exception when browsing to a directory that the user does not have access to. The vfs now catches the boost exception and throws a FIFE exception. Updated the filebrowser to catch the exception and display a warning to the user. fixes[t:413]

<VBox opaque='1'>
	<Button name="moveButton" text="Move here" />
	<Button name="talkButton" text="Talk" />
	<Button name="kickButton" text="Kick" />
	<Button name="inspectButton" text="Inspect" />
</VBox>