test qsplitter

src/gui/edit_tandem_preset_dialog/edit_tandem_preset_dialog.ui

@@ -16,24 +16,41 @@
   <property name="windowTitle">
    <string>Labeling methods editor</string>
   </property>
-  <layout class="QVBoxLayout" name="verticalLayout_3">
+  <layout class="QVBoxLayout" name="verticalLayout_2">
    <item>
     <widget class="QMenuBar" name="menubar"/>
    </item>
+   <item>
+    <widget class="QWidget" name="widget" native="true">
+     <layout class="QGridLayout" name="gridLayout">
+      <item row="0" column="0">
+       <widget class="QSplitter" name="splitter">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <widget class="QTabWidget" name="tabWidget">
+         <property name="currentIndex">
+          <number>0</number>
+         </property>
+         <widget class="QWidget" name="tab">
+          <attribute name="title">
+           <string>Tab 1</string>
+          </attribute>
+         </widget>
+         <widget class="QWidget" name="tab_2">
+          <attribute name="title">
+           <string>Tab 2</string>
+          </attribute>
+         </widget>
+        </widget>
+        <widget class="QPlainTextEdit" name="plainTextEdit"/>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <layout class="QVBoxLayout" name="verticalLayout">
-     <item>
-      <widget class="QGroupBox" name="groupBox">
-       <property name="title">
-        <string>Labeling methods</string>
-       </property>
-       <layout class="QVBoxLayout" name="verticalLayout_2">
-        <item>
-         <widget class="QListView" name="method_list_view"/>
-        </item>
-       </layout>
-      </widget>
-     </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout">
        <item>