Setting Maximum Value for Transparency spin button in area sidebar tab

Change-Id: Idb1c5051de5ddb0501b8d1440f8abe62074296bc
Reviewed-on: https://gerrit.libreoffice.org/16144Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>
Tested-by: Katarina Behrens <Katarina.Behrens@cib.de>

svx/uiconfig/ui/sidebararea.ui

@@ -3,6 +3,12 @@
 <interface>
   <requires lib="gtk+" version="3.0"/>
   <requires lib="LibreOffice" version="1.0"/>
+  <object class="GtkAdjustment" id="adjustment1">
+    <property name="lower">0</property>
+    <property name="upper">100</property>
+    <property name="step_increment">1</property>
+    <property name="page_increment">10</property>
+  </object>
   <object class="GtkGrid" id="AreaPropertyPanel">
     <property name="visible">True</property>
     <property name="can_focus">False</property>
@@ -185,6 +191,7 @@
                     <property name="hexpand">True</property>
                     <property name="max_length">100</property>
                     <property name="invisible_char">•</property>
+                    <property name="adjustment">adjustment1</property>
                     <property name="secondary_icon_activatable">False</property>
                     <property name="climb_rate">5</property>
                     <property name="numeric">True</property>