Increase accuracy range to 15

Author: vkareh

data/org.mate.calc.gschema.xml.in

@@ -21,7 +21,7 @@
   <schema path="/org/mate/calc/" id="org.mate.calc" gettext-domain="mate-calc">
     <key type="i" name="accuracy">
       <default>9</default>
-      <range min="0" max="9"/>
+      <range min="0" max="15"/>
       <summary>Accuracy value</summary>
       <description>The number of digits displayed after the numeric point</description>
     </key>

data/preferences.ui

@@ -11,7 +11,7 @@
     </columns>
   </object>
   <object class="GtkAdjustment" id="decimal_places_adjustment">
-    <property name="upper">9</property>
+    <property name="upper">15</property>
     <property name="step_increment">1</property>
     <property name="page_increment">1</property>
   </object>