Bugfix: draw sections labels with standart font size (LABEL_FONT_SIZE).

diff --git a/qwerty.py b/qwerty.py
index aec4c1e..60ab8d7 100755
--- a/qwerty.py
+++ b/qwerty.py
@@ -244,7 +244,7 @@ class SectionButton(SuperButton):
         if self.label:
             cr.set_source_rgb(*BUTTON_BORDER_ACTIVE)
             cr.move_to(20,30)
-            cr.set_font_size(16)
+            cr.set_font_size(LABEL_FONT_SIZE)
             cr.show_text(self.label)

 class Section(object):