Show asset if asset's external id specified in URL
Open form and highlight asset when switching URL
Keep position when switching asset via click
Merge remote-tracking branch 'origin/master' into open_asset_directly

Conflicts:
	digiroad2-geo/src/main/scala/fi/liikennevirasto/digiroad2/asset/AssetProvider.scala
	digiroad2-geo/src/main/scala/fi/liikennevirasto/digiroad2/asset/NoOpAssetProvider.scala
Merge pull request #164 from finnishtransportagency/open_asset_directly

Open asset directly