only modify color aspect, not e.g. pen style
remove GeoOnfParser

The GeoOnfParser has been superseeded by the NominatimSearchPlugin. Hence, it can be removed.

REVIEW: 111064
Allow for labels in GeoLineStringGraphicsItem.
GraticulePlugin: Use GeoGraphicsItems for rendering the grid
factor out ScreenLayer from GeometryLayer
wip idis
GeoGraphicsScene
always create a canvas image in texture mappers
GeoPainter::mapTexture()
const'ify
remove ViewportParams parameter from MarbleGraphicsItem::paintEvent()
const'ify changeViewport()
split GeoGraphicsItem::paint()
remove customPaint()
WIP: split LayerInterface::render() into paint() and setViewport()
deactivate to-be-ported RenderPlugins
Use line width from line style

* Set pen with for lines from line style if available
  in GeoLineStringGraphicsItems
Allow for icons in icon style

* If an icon is set in icon style for a GeoPointGraphicsItem
  draw it at the point's position
Allow for settings a font in MarbleGraphicsItems
MeasureToolPlugin: Port to GeoGraphicsItems