Bookmark Refactor (#893)

* Fixed a bug which didn't take sort direction when not changing sort field

* Added foundation for Bookmark refactor

* Code broken, need to take a break. Issue is Getting bookmark image needs authentication but UI doesn't send.

* Implemented the ability to send bookmarked files to the web. Implemented ability to clear bookmarks on disk on a re-occuring basis.

* Updated the bookmark design to have it's own card that is self contained. View bookmarks modal has been updated to better lay out the cards.

* Refactored download bookmark codes to select files from bookmark directory directly rather than open underlying files.

* Wrote the basic logic to kick start the bookmark migration.

Added Installed Version into the DB to allow us to know more accurately when to run migrations

* Implemented the ability to change the bookmarks directory

* Updated all references to BookmarkDirectory to use setting from the DB.

Updated Server Settings page to use 2 col for some rows.

* Refactored some code to DirectoryService (hasWriteAccess) and fixed up some unit tests from a previous PR.

* Treat folders that start with ._ as blacklisted.

* Implemented Reset User preferences. Some extra code to prep for the migration.

* Implemented a migration for existing bookmarks to using new filesystem based bookmarks

API/Helpers/Converters/ServerSettingConverter.cs

@@ -42,6 +42,9 @@ namespace API.Helpers.Converters
                     case ServerSettingKey.BaseUrl:
                         destination.BaseUrl = row.Value;
                         break;
+                    case ServerSettingKey.BookmarkDirectory:
+                        destination.BookmarksDirectory = row.Value;
+                        break;
                 }
             }