calculatorwidget: Restrict css style to calculator widget, change font size

Author: Sigma1912

lib/python/gladevcp/calculatorwidget.py

@@ -98,9 +98,10 @@ def __init__( self, *a, **kw ):
         # Use CSS style for buttons
         screen = Gdk.Screen.get_default()
         provider = Gtk.CssProvider()
-        style_context = Gtk.StyleContext()
+        self.calc_box.set_name("calc_widget")
+        style_context = self.calc_box.get_style_context()
         style_context.add_provider_for_screen(screen, provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
-        css = b"button {padding: 0;}"
+        css = b"#calc_widget {font-size: 15px;}"
         provider.load_from_data(css)
 
     def num_pad_only( self, value ):