Util: Consolidate console URL generation in PortMapper

...esktopgui/src/net/i2p/desktopgui/InternalTrayManager.java

...l/java/src/net/i2p/i2ptunnel/I2PTunnelHTTPClientBase.java

...ole/java/src/net/i2p/router/web/ConfigServiceHandler.java

...nsole/java/src/net/i2p/router/web/helpers/HomeHelper.java

...va/src/net/i2p/router/web/helpers/SummaryBarRenderer.java

apps/routerconsole/jsp/configservice.jsp

core/java/src/net/i2p/util/PortMapper.java