make progress_bar text as label

vanilla_first_setup/gtk/progress.ui

@@ -15,9 +15,22 @@
                 <property name="allow_long_swipes">False</property>
             </object>
         </child>
+        <child>
+            <object class="GtkLabel" id="progressbar_text">
+                <property name="wrap">True</property>
+                <property name="wrap-mode">word-char</property>
+                <property name="halign">start</property>
+                <property name="valign">center</property>
+                <property name="margin-top">40</property>
+                <property name="margin-start">40</property>
+                <property name="label" translatable="true">The changes are being applied. Please Wait…</property>
+                <style>
+                    <class name="title-4"/>
+                </style>
+            </object>
+        </child>
         <child>
             <object class="GtkProgressBar" id="progressbar">
-              <property name="text" translatable="true">The changes are being applied. Please Wait…</property>
               <property name="show-text">true</property>
               <property name="margin-top">40</property>
               <property name="margin-start">40</property>