message: Fix sizing of IOTab layout
diff: <rect>
  <x>0</x>
  <y>0</y>
  - <width>400</width>
  - <height>300</height>
  + <width>672</width>
  + <height>466</height>
  </rect>
  </property>
  <property name="windowTitle">
  <string>Form</string>
  </property>
  <layout class="QGridLayout" name="gridLayout_4">
  - <item row="0" column="0">
  + <item row="0" column="1">
  <widget class="QSplitter" name="splitter">
  + <property name="sizePolicy">
  + <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
  + <horstretch>0</horstretch>
  + <verstretch>0</verstretch>
  + </sizepolicy>
  + </property>
  + <property name="minimumSize">
  + <size>
  + <width>0</width>
  + <height>0</height>
  + </size>
  + </property>
  <property name="orientation">
  <enum>Qt::Horizontal</enum>
  </property>
  <widget class="QTabWidget" name="tabWidget">
  <property name="sizePolicy">
  <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
  - <horstretch>1</horstretch>
  + <horstretch>2</horstretch>
  <verstretch>0</verstretch>
  </sizepolicy>
  </property>
  + <property name="minimumSize">
  + <size>
  + <width>400</width>
  + <height>0</height>
  + </size>
  + </property>
  <property name="currentIndex">
  <number>0</number>
  </property>
  <string>Peripherals</string>
  </attribute>
  <layout class="QGridLayout" name="gridLayout_2">
  - <item row="0" column="1">
  - <layout class="QVBoxLayout" name="verticalLayout" stretch="0,0">
  - <item>
  - <widget class="QTableWidget" name="peripheralsTable"/>
  - </item>
  - <item>
  + <item row="0" column="0">
  + <widget class="QSplitter" name="splitter_2">
  + <property name="orientation">
  + <enum>Qt::Vertical</enum>
  + </property>
  + <property name="childrenCollapsible">
  + <bool>false</bool>
  + </property>
  + <widget class="QTableWidget" name="peripheralsTable">
  + <property name="sizePolicy">
  + <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
  + <horstretch>0</horstretch>
  + <verstretch>0</verstretch>
  + </sizepolicy>
  + </property>
  + </widget>
  <widget class="QTabWidget" name="peripheralsTab">
  + <property name="sizePolicy">
  + <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
  + <horstretch>0</horstretch>
  + <verstretch>1</verstretch>
  + </sizepolicy>
  + </property>
  + <property name="currentIndex">
  + <number>0</number>
  + </property>
  <widget class="QWidget" name="tab">
  <attribute name="title">
  <string>Tab 1</string>
  </attribute>
  </widget>
  </widget>
  - </item>
  - </layout>
  + </widget>
  </item>
  </layout>
  </widget>
  