Add combo box to setup page UI

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

src/gui/wizard/owncloudsetupnocredspage.ui

@@ -199,6 +199,9 @@
             </item>
            </layout>
           </item>
+          <item>
+           <widget class="QComboBox" name="comboBox"/>
+          </item>
           <item>
            <layout class="QHBoxLayout" name="horizontalLayout_5">
             <property name="topMargin">