Move redirect rule to 2 row, remove no-wrap (#55)

- Fix redirect rule handling with endpoint routing (#59)
- Make subtitle non-nullable string (#47)

src/MyWebLog/Handlers/Post.fs

@@ -139,7 +139,7 @@ let pageOfCategorizedPosts slugAndPage : HttpHandler = fun next ctx -> task {
                 return!
                     { viewCtx with
                         PageTitle      = $"{cat.Name}: Category Archive{pgTitle}"
-                        Subtitle       = cat.Description
+                        Subtitle       = defaultArg cat.Description ""
                         IsCategory     = true
                         IsCategoryHome = (pageNbr = 1)
                         Slug           = Some slug }