Code restructured
Event handlers added for polygon and circle. Event handler for layerselector stripped
SelectedContentChanged event handler uncommented
Header adjusted
Handle state of input container(disable/enable)
setFilter method implemented: spatial filter can be created (and works)!
One method for drawing geometries. Remove all features when drawing (in the future this can be a checkbox, to allow for multiple geometries)
OpenLayers has now the ability to draw a rectangle (box). SpatialFilter component can draw rectangles as filter.