message: [Qt] Show display unit option as text
  Quick fix for the display unit option showing a numeric value when
  saving instead of the proper text value.
diff: </spacer>
  </item>
  <item>
  - <widget class="QComboBox" name="comboBoxUnit">
  + <widget class="QValueComboBox" name="comboBoxUnit">
  <property name="minimumSize">
  <size>
  <width>180</width>
  