Fixed welcome page picture align

ubinstall-gtk.glade

@@ -581,6 +581,7 @@ agreement</property>
                               <object class="GtkLabel" id="WelcomeTitleLabel">
                                 <property name="visible">True</property>
                                 <property name="can-focus">False</property>
+                                <property name="halign">center</property>
                                 <property name="label" translatable="yes">Welcome to UBLinux installation</property>
                                 <property name="wrap">True</property>
                                 <attributes>
@@ -598,6 +599,7 @@ agreement</property>
                               <object class="GtkLabel" id="WelcomeInfoLabel">
                                 <property name="visible">True</property>
                                 <property name="can-focus">False</property>
+                                <property name="halign">center</property>
                                 <property name="label" translatable="yes">This program will ask you few questions
 and help you install UBLinux on your computer</property>
                                 <property name="wrap">True</property>
@@ -615,6 +617,8 @@ and help you install UBLinux on your computer</property>
                               <object class="GtkImage">
                                 <property name="visible">True</property>
                                 <property name="can-focus">False</property>
+                                <property name="halign">center</property>
+                                <property name="valign">center</property>
                                 <property name="pixel-size">128</property>
                                 <property name="resource">/com/ublinux/images/language.png</property>
                               </object>