[PATCH] qconf: Back button behaviour normalization

Do "Back" button behaviour normalization so it is enabled starting from
second-level menu only.
Signed-off-by: NCyrill V. Gorcunov <gorcunov@gmail.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

scripts/kconfig/qconf.cc

@@ -1472,7 +1472,10 @@ void ConfigMainWindow::searchConfig(void)
 void ConfigMainWindow::changeMenu(struct menu *menu)
 {
 	configList->setRootMenu(menu);
-	backAction->setEnabled(TRUE);
+	if (configList->rootEntry->parent == &rootmenu)
+		backAction->setEnabled(FALSE);
+	else
+		backAction->setEnabled(TRUE);
 }
 
 void ConfigMainWindow::setMenuLink(struct menu *menu)