message: qt: Make "Create new receiving address" default unconditionally
  This change makes this button visually accented, and gives to users a
  hint about the primary action.
  This commit does not change behavior.
diff: <iconset resource="../bitcoin.qrc">
  <normaloff>:/icons/receiving_addresses</normaloff>:/icons/receiving_addresses</iconset>
  </property>
  + <property name="autoDefault">
  + <bool>false</bool>
  + </property>
  + <property name="default">
  + <bool>true</bool>
  + </property>
  </widget>
  </item>
  <item>
  