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

UI/Web/src/app/cards/bookmark/bookmark.component.scss

@@ -0,0 +1,25 @@
+.card-body {
+    padding: 5px;
+}
+
+.card {
+    margin-left: 5px;
+    margin-right: 5px;
+}
+
+.header-row {
+    display: flex;
+    justify-content: space-between;
+    align-items: flex-start;
+}
+
+.title-overflow {
+    font-size: 13px;
+    width: 130px;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    overflow: hidden;
+    display: block;
+    margin-top: 2px;
+    margin-bottom: 0px;
+}