Enable overloading of task triggerring source cell editor (SINGLE) in resource editor. PLCGenerator now generates MULTI keywork instead of SINGLE when task's activation is surroundes with square brackets
<xsd:attribute name="Compiler" type="xsd:string" use="optional" default="gcc"/>
<xsd:attribute name="CFLAGS" type="xsd:string" use="required"/>
<xsd:attribute name="Linker" type="xsd:string" use="optional" default="gcc"/>
<xsd:attribute name="LDFLAGS" type="xsd:string" use="required"/>