Fixed preview drawing/refresh problem in sfc/ld/fbd graphical element creation dialogs on windows (introduced in 9c5f835b031e, continuation of 9622418ac28c)
<xsd:element name="Xenomai">
<xsd:complexType>
%(toolchain_gcc)s
<xsd:attribute name="XenoConfig" type="xsd:string" use="optional" default="xeno-config"/>
</xsd:complexType>
</xsd:element>