fix #10655 - WayConnectedToArea should not warn on `leisure=slipway`

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7644 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #10252 - remove some old `route=*` tags from mappaint style; improve display of `route=ski`; add validator warning for `route=bus` on a way

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7645 0c6e7542-c601-0410-84e7-c038aed88b3b
fix #10663 - allow way for `leisure=slipway` in preset; syntax fix

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7646 0c6e7542-c601-0410-84e7-c038aed88b3b