sync RTGUI with github(https://github.com/RT-Thread/RTGUI)

a8dac7ed473f381b7042cf9d14028488192624c5
As always, full log is in GitHub.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2276 bbd45198-f89e-11dd-88c7-29a3b14d5316

components/rtgui/SConscript

@@ -59,7 +59,6 @@ widgets/staticline.c
 widgets/textbox.c
 widgets/listbox.c
 widgets/title.c
-widgets/toplevel.c
 widgets/notebook.c
 widgets/container.c
 widgets/list_view.c
@@ -69,6 +68,8 @@ widgets/window.c
 widgets/panel.c
 widgets/groupbox.c
 widgets/edit.c
+widgets/plot.c
+widgets/plot_curve.c
 """)
 
 # The set of source files associated with this SConscript file.