Doc: Complete parameter documentation

qdeclarativegeomap.cpp: 1327: warning: Can't link to 'Component.onCompleted'
qgeopath.cpp:117: warning: Undocumented parameter 'width' in QGeoPath::QGeoPath()
qgeopath.cpp:117: warning: Undocumented parameter 'path' in QGeoPath::QGeoPath()
qgeoshape.cpp:90: warning: Undocumented enum item 'PathType' in QGeoShape::ShapeType
qgeoshape.cpp:231: warning: No such parameter 'QGeoRectangle' in QGeoShape::boundingGeoRectangle()

Change-Id: Ie57dff2aabe82d61b8122362a396ac706939c3b3
Reviewed-by: Paolo Angelelli <paolo.angelelli@qt.io>