File Created Date (#1434)

* Capture date when Kavita creates a MangaFile so we can show the date on the UI.

* On startup, exit early for migration directory if it's a fresh install and we have migrations to run but no settings stored yet.

* Blur summaries should apply when there isn't any read more collapsable

* Fixed custom theme files not loading.

* Cleaned up the logic for displaying the manga file date

API/Program.cs

@@ -105,6 +105,7 @@ namespace API
             string currentVersion = null;
             try
             {
+                if (!await context.ServerSetting.AnyAsync()) return "vUnknown";
                 currentVersion =
                     (await context.ServerSetting.SingleOrDefaultAsync(s =>
                         s.Key == ServerSettingKey.InstallVersion))?.Value;