don't stretch listbox vertically

Change-Id: Id50412ae0f29a340839b68faa53e223f7ac03fd2

dbaccess/uiconfig/ui/mysqlnativepage.ui

 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.16.1 -->
 <interface>
-  <!-- interface-requires gtk+ 3.0 -->
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-requires LibreOffice 1.0 -->
   <object class="GtkBox" id="MysqlNativePage">
     <property name="visible">True</property>
@@ -118,7 +119,6 @@
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
-                    <property name="use_action_appearance">False</property>
                     <property name="xalign">0</property>
                     <property name="draw_indicator">True</property>
                   </object>
@@ -164,8 +164,8 @@
           <object class="GtkAlignment" id="alignment3">
             <property name="visible">True</property>
             <property name="can_focus">False</property>
+            <property name="valign">start</property>
             <property name="hexpand">True</property>
-            <property name="vexpand">True</property>
             <property name="top_padding">6</property>
             <property name="left_padding">12</property>
             <child>
@@ -173,7 +173,6 @@
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="hexpand">True</property>
-                <property name="vexpand">True</property>
                 <property name="spacing">6</property>
                 <child>
                   <object class="GtkLabel" id="charsetlabel">