SVGHMI: move declaration of "xmlns" javascript const so that widgets can use it.
This was broken in earlier commit, when changing initial execution order because of implementing websocket reconnect.
<?xml version='1.0' encoding='utf-8'?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.plcopen.org/xml/tc6_0201" xmlns:xhtml="http://www.w3.org/1999/xhtml" xsi:schemaLocation="http://www.plcopen.org/xml/tc6_0201">
<fileHeader companyName="Beremiz" productName="Beremiz" productVersion="0.0" creationDateTime="2008-12-14T16:53:26"/>
<contentHeader name="Beremiz non-standard POUs library" modificationDateTime="2019-08-06T14:08:26">
<coordinateInfo>
<fbd>
<scaling x="0" y="0"/>
</fbd>
<ld>
<scaling x="0" y="0"/>
</ld>
<sfc>
<scaling x="0" y="0"/>
</sfc>
</coordinateInfo>
</contentHeader>
<types>
<dataTypes>
<dataType name="HMI_INT">
<baseType>
<INT/>
</baseType>
</dataType>
<dataType name="HMI_REAL">
<baseType>
<REAL/>
</baseType>
</dataType>
<dataType name="HMI_STRING">
<baseType>
<string/>
</baseType>
</dataType>
<dataType name="HMI_BOOL">
<baseType>
<BOOL/>
</baseType>
</dataType>
<dataType name="HMI_NODE">
<baseType>
<BOOL/>
</baseType>
</dataType>
</dataTypes>
<pous/>
</types>
<instances>
<configurations/>
</instances>
</project>