Fixed black windows bug

ubl-settings-datetime.glade

@@ -1312,7 +1312,6 @@ Format: DD.MM.YYYY</property>
   </object>
   <object class="GtkWindow" id="windowMessDchp">
     <property name="can-focus">False</property>
-    <property name="valign">start</property>
     <property name="resizable">False</property>
     <child>
       <object class="GtkBox">
@@ -1414,8 +1413,6 @@ Format: DD.MM.YYYY</property>
   </object>
   <object class="GtkApplicationWindow" id="wndShowWeb">
     <property name="can-focus">False</property>
-    <property name="halign">start</property>
-    <property name="valign">start</property>
     <property name="resizable">False</property>
     <property name="default-width">450</property>
     <property name="default-height">250</property>