Allow hyperlinks in UnpBootNavigator and UnpBootHeader as menu choices

[RichSharpe]

Currently the menu options in these controls only open XPages in the currentDB.
The following change to the onclick event of the xp:link (line 68 in the UnpBootNavigator) allows a URL to be entered into the JSON string and activated by users.

if (child.ajaxloadid != null && child.ajaxloadid != ""){
return "unp.loadPage('" + getDbPath() + child.page + "?rnd=' + Date.now()+ ' #" + child.ajaxloadid + "', '" + child.ajaxtargetid + "', " + viewScope.menuitemindex + "); return false;";
}else if(child.page.indexOf("http://") > -1){
return "window.location.href='" + child.page + "'";
}else{
return "window.location.href='" + getDbPath() + child.page + "'";
}

This even allows Unplugged users to navigate to web pages if a connection exists.

[RichSharpe]

Actually a 'fuller' implementation would be to also test for a 404 error and alert users on Unplugged that no connection is available.