Switch to unified view

a/src/qtgui/uiprefs.ui b/src/qtgui/uiprefs.ui
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                            </widget>
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                            </widget>
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                        </vbox>
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                        </vbox>
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                    </widget>
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                    </widget>
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                    <widget class="QWidget">
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                    <widget class="QWidget">
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                        <property name="name">
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                        <property name="name">
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                            <cstring>tab</cstring>
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                            <cstring>tab1</cstring>
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                        </property>
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                        </property>
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                        <attribute name="title">
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                        <attribute name="title">
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                            <string>Search parameters</string>
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                            <string>Search parameters</string>
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                        </attribute>
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                        </attribute>
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                        <vbox>
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                        <vbox>