Make the Preferences window a panel.

This enables the standard behaviour of dismissing the panel with the <esc> key.

Author: klacoste

DBPrefsWindowController.m

@@ -74,13 +74,13 @@ - (void)windowDidLoad
 		// Create a new window to display the preference views.
 		// If the developer attached a window to this controller
 		// in Interface Builder, it gets replaced with this one.
-	NSWindow *window = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0,0,1000,1000)
+	NSPanel *panel = [[[NSPanel alloc] initWithContentRect:NSMakeRect(0,0,1000,1000)
 												    styleMask:(NSTitledWindowMask |
 															   NSClosableWindowMask |
 															   NSMiniaturizableWindowMask)
 													  backing:NSBackingStoreBuffered
 													    defer:YES] autorelease];
-	[self setWindow:window];
+	[self setWindow:panel];
 	contentSubview = [[[NSView alloc] initWithFrame:[[[self window] contentView] frame]] autorelease];
 	[contentSubview setAutoresizingMask:(NSViewMinYMargin | NSViewWidthSizable)];
 	[[[self window] contentView] addSubview:contentSubview];