Fixes the drawingcomponent/OpenLayersVectorLayer for OpenLayers 2.13.1. In OL 2.13.1 the modifyFeature didn't have a selectfeature anymore, so we removed it from de OpenLayersVectorLayer and replaced (where neccessary) with the modifyfeature control. Probably fixed part of #215, but not quite yet, because now drawing doesn't seem to have a activeFeature anymore
Selecting of features now works again and is propagated properly. Saving and opening works again. Changing colors and labels works again, also with changing between features