Fix crosshair positioning bug and revert back to site structure clean up changes

This reverts commit 2ffb4e4670642fc7c7ba01351bedd256025bb918.
Change road owner label back to original
Add foreign key constraint to LRM position reference in assets
Add functionality to remove asset from database
Merge pull request #258 from finnishtransportagency/add_asset_removal

Add asset removal
Rename deleteLRMeasure -> deleteLRMPosition
Remove old action panel styles
Icon webfont
Styled zoom buttons
Refactored marker implementation and styles for bus stops
Bus stop selection changes content in asset layer, wip
Style for expanded bus stop
Handle for asset type changes
Handle direction change
Fix reset state on cancel
Bind click event only once
Performance fix
Fix merge
Hide markers instead of clearing them
Fix cancel implementation when adding new marker