GraphicFill and GraphicStroke are exclusive

[jansule]

In contrast to the geoserver sld-documentation, GraphicFill and GraphicStroke are exclusive. Thus, only one of both can be set at a time. This can be seen in the sldSchema:

<xsd:complexType>
  <xsd:sequence>
    <xsd:choice minOccurs="0">
      <xsd:element ref="sld:GraphicFill"/>
      <xsd:element ref="sld:GraphicStroke"/>
    </xsd:choice>
    <xsd:element ref="sld:CssParameter" minOccurs="0" maxOccurs="unbounded"/>
  </xsd:sequence>
</xsd:complexType>

geostyler-sld-parser and the UI should be updated accordingly.

• Updated geostyler-sld-parser
• Updated UI