Symbols ui combo

[Pavel Sanda]

hi,
guisymbols combo is too small. i will commit this if no objections.
pavel

diff --git a/src/frontends/qt4/ui/SymbolsUi.ui 
b/src/frontends/qt4/ui/SymbolsUi.ui
index 7f3cd1b..2b4b907 100644
--- a/src/frontends/qt4/ui/SymbolsUi.ui
+++ b/src/frontends/qt4/ui/SymbolsUi.ui
@@ -47,7 +47,11 @@
       </widget>
      </item>
      <item>
-      <widget class="QComboBox" name="categoryCO" />
+      <widget class="QComboBox" name="categoryCO" >
+       <property name="maxVisibleItems" >
+        <number>20</number>
+       </property>
+      </widget>
      </item>
     </layout>
    </item>