fixed bugs discovered in workshop

original commit: 630fb3f251906de791cf011952784dff547ca5e6

collects/mred/exit.ss

@@ -36,9 +36,9 @@
     (define -exit
       (let*-values ([(exiting?) #f]
 		    [(w capW)
-		     (if (eq? wx:platform 'macintosh)
-			 (values "quit" "Quit")
-			 (values "exit" "Exit"))]
+		     (if (eq? wx:platform 'windows)
+			 (values "exit" "Exit")
+			 (values "quit" "Quit"))]
 		    [(message)
 		     (string-append "Are you sure you want to "
 				    w

collects/mred/prefs.ss

@@ -342,9 +342,11 @@
 			     (lambda (button evt)
 			       (let ([new-value
 				      (mred:gui-utils:get-single-choice
-				       "message"
-				       "caption"
-				       fonts)])
+				       (format "Please choose a new ~a font"
+					       name)
+				       "Fonts"
+				       fonts
+				       null -1 -1 #t 300 400)])
 				 (unless (null? new-value)
 				   (wx:write-resource 
 				    section
@@ -387,6 +389,8 @@
 				 (unbox b)
 				 default-font-size))
 			   1 127 50))
+	    (make-object mred:message% main
+			 "Restart to see font changes")
 	    main))
 	#f)))