Switch to side-by-side view

--- a/src/qtgui/preview.ui
+++ b/src/qtgui/preview.ui
@@ -96,12 +96,6 @@
                             <property name="name">
                                 <cstring>searchTextLine</cstring>
                             </property>
-                            <property name="frameShape">
-                                <enum>LineEditPanel</enum>
-                            </property>
-                            <property name="frameShadow">
-                                <enum>Sunken</enum>
-                            </property>
                         </widget>
                         <widget class="QPushButton">
                             <property name="name">