- Bug #1714; editmode undo error when ESC after extrude (missing undopush)

- Curve Join now moves all curves to 2D (if its 2D)
- FGon extrude keeps FGon flags correctly
- After Append undo-push added
- In almost all Ipo editing commands; undo-push added
- Icons in outliner now all consistant grey
- Zoffs button had to 20 high (hmetal :)

source/blender/src/editobject.c

@@ -6634,7 +6634,8 @@ void transform(int mode)
 	tottrans= 0;
 
 	/* undo after transform, since it's storing current situations */
-	if(canceled==0) 
+	/* extrude has no own undo-push, so on cancel we still insert it */
+	if(canceled==0 || strcmp(undostr, "Extrude")==0) 
 		BIF_undo_push(undostr);
 }