OPDS Rework (#1164)

* Fixed a bug where the bottom of the page could be cut off

* Adjusted all the headings to h2, which looks better

* Refactored GetSeriesDetail to actually map the names inside the code so the UI just displays.

* Put in some basic improvements to OPDS by using Series Detail type layout, but this only reduces one click.

* Fixed a bug where offset from scrollbar fix causes readers to be cutoff.

* Ensure the hamburger menu icon is aligned with side nav

* Disable the image splitting dropdown in webtoon mode

* Fixed broken progress/scroll code as we scroll on the body instead of window now

* Fixed phone-hidden class not working due to a bad media query

* Lots of changes to OPDS to provide a richer text experience. Uses Issues or Books based on library type. Cleans up the experience by providing Storyline from the get-go.

* Updated OPDS-SE search description to include collections and reading lists.

* Fixed up some title stuff

* If a volume only has one file underneath it, flatten it and send a chapter as if it were the volume.

* Code cleanup

UI/Web/src/app/nav-header/nav-header.component.scss

@@ -8,6 +8,7 @@
 
     .side-nav-toggle {
         cursor: pointer;
+        margin-left: 13px;
         font-size: 1.2rem;
         i {
             color: var(--navbar-fa-icon-color);