[gnome-calculator] Fixes MathConverter being shown on Basic mode if it was set on startup

[Alberto Ruiz <aruiz src gnome org>]

commit e98de4c011000f688ccdc4a3043f100e44661518
Author: Alberto Ruiz <aruiz gnome org>
Date:   Sat Jan 16 13:09:30 2016 +0000

    Fixes MathConverter being shown on Basic mode if it was set on startup

 data/math-converter.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/math-converter.ui b/data/math-converter.ui
index d94bf74..391f604 100644
--- a/data/math-converter.ui
+++ b/data/math-converter.ui
@@ -3,7 +3,7 @@
 <interface>
   <requires lib="gtk+" version="3.16"/>
   <template class="MathConverter" parent="GtkGrid">
-    <property name="visible">True</property>
+    <property name="visible">False</property>
     <property name="can_focus">False</property>
     <property name="row_spacing">6</property>
     <property name="column_spacing">6</property>