AppSettings has wrong type (<string, IAppSetting> should be <string, string>)

[MattMcL4475]

Currently when retrieving the AppSettings from a WebApp, the object that is returned is:

IReadOnlyDictionary<string, IAppSetting> AppSettings

This seems to be incorrect; I would expect AppSettings to contain a dictionary of key/value pairs. Instead, it contains a dictionary of key/[value.key, value.value] pairs.

Notice how one has to access the desired key/value pair:

var webApp = azure.WebApps.GetById(resourceId);
var settings = webApp.AppSettings;
foreach (var setting in settings)
{
    var key = setting.Value.Key;  // this is strange.  Should be "setting.Key"
    var value = setting.Value.Value; // this is strange.  Should be "setting.Value"
}