Switch to side-by-side view

--- a/src/qtgui/uiprefs.ui
+++ b/src/qtgui/uiprefs.ui
@@ -311,6 +311,16 @@
              </property>
              <property name="checked">
               <bool>false</bool>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QCheckBox" name="showTempFileWarningCB">
+             <property name="text">
+              <string>Show warning when opening temporary file.</string>
+             </property>
+             <property name="checked">
+              <bool>true</bool>
              </property>
             </widget>
            </item>