OSGi: add gutter icon for Felix Properties

[deeprim]

Add property gutter for Felix properties declared via org.apache.felix.scr.annotations.Properties annotation and for OSGI R6 org.osgi.service.component.annotations.Component inline properties.

Felix properties:

@Component 
@Service
@Properties({
    @Property(name="sling.servlets.resourcetypes",value="project/components/header"), 
    @Property(name="sling.servlets.selector",value="foo"),
    @Property(name=HeaderServlet.SOME_PROPERTY_VALUE,value="foo")
})
public class HeaderServlet implements SlingSafeMethodsServet { 
static final String SOME_PROPERTY_VALUE = "value";
...
}