Sort the list of localized alternate links

Since the locales is a map, and maps in Go do not have order, sometime
the language switcher was shown in a different order.

I sort by language code, which is as arbitrary as sorting by name, but
makes sense to me.

pkg/app/public.go

@@ -6,13 +6,13 @@
 package app
 
 import (
-	"fmt"
-	"net/http"
-
 	"dev.tandem.ws/tandem/camper/pkg/auth"
 	"dev.tandem.ws/tandem/camper/pkg/database"
 	httplib "dev.tandem.ws/tandem/camper/pkg/http"
 	"dev.tandem.ws/tandem/camper/pkg/template"
+	"fmt"
+	"net/http"
+	"sort"
 )
 
 type publicHandler struct{}
@@ -65,7 +65,7 @@ func (p *PublicPage) MustRender(w http.ResponseWriter, r *http.Request, user *au
 			HRef:    fmt.Sprintf("%s://%s/%s%s", schema, authority, l.Language, path),
 		})
 	}
-
+	sort.Slice(p.LocalizedAlternates, func(i, j int) bool { return p.LocalizedAlternates[i].Lang < p.LocalizedAlternates[j].Lang })
 	template.MustRenderPublic(w, r, user, company, p.template, p)
 }