misc stuff to avoid scan loop (#1389)

* Implemented a workaround for nginx users with BlockCommonExploits enabled, which would interfere with book image escaping done by Kavita when images had ../ in their path.

* Added back to top support on all pages but those that untilize virtual scrolling without a parent scroll.

* Hide jumpbar on pages where there is no scroll

* Refactored jumbar code into a dedicated service

* Stash some jumpkey resume code as I can't get it working with the virtual scroller.

* Don't allow non-admins to see File locations on card detail drawer.

* Some cleanup on GetServerInfo

* When an error occurs in register, delete the user on exception.

* Fixed a NPE in Stat collection for brand new users

* When we catch an exception on registering a new user, delete the user as rolling back doesn't do anything.

* Don't close typeahead when we are selecting options from it

* Added shortcut key H to open shortcut modal on manga reader

* When processing progress updates on cards, for volumes, properly find the chapter to update pages read.

* Hide cover image on reading list if it's not set and fixed a missing closing div tag

* Hide collection poster when nothing is set on collection detail

* Small fix around updating state

* Sped up the bookmark image call by removing one DB call

* Fixed broken test from change in bookmark code

* Fixed an oversight where if there is no tag in ComicInfo after a chapter was updated with People or Genres, then the People/Genres would never be removed.

* Added test with TagHelper

* Fixed a bug where 2 clear buttons would show on search bar due to browser injecting their own. Search bar wont show clear button until text is typed.

* Fixed a bug where InstallID wasn't being selected correctly in converter

UI/Web/src/app/reading-list/reading-list-detail/reading-list-detail.component.html

@@ -11,7 +11,7 @@
 <div class="container-fluid mt-2" *ngIf="readingList">
 
   <div class="row mb-3">
-    <div class="col-md-2 col-xs-4 col-sm-6 d-none d-sm-block" *ngIf="readingList.coverImage !== '' || readingList.coverImage !== undefined">
+    <div class="col-md-2 col-xs-4 col-sm-6 d-none d-sm-block" *ngIf="readingList.coverImage !== '' && readingList.coverImage !== undefined && readingList.coverImage !== null">
         <app-image maxWidth="300px" maxHeight="400px" [imageUrl]="readingListImage"></app-image>
     </div>
     <div class="col-md-10 col-xs-8 col-sm-6 mt-2">
@@ -45,7 +45,9 @@
         <app-read-more [text]="readingListSummary" [maxLength]="250"></app-read-more>
       </div>
     </div>
+  </div>
 
+  <div class="row mb-3">
     <div class="mx-auto" style="width: 200px;">
       <ng-container *ngIf="items.length === 0 && !isLoading">
         Nothing added
@@ -64,4 +66,5 @@
             [promoted]="item.promoted" (read)="readChapter($event)"></app-reading-list-item>
         </ng-template>
     </app-draggable-ordered-list>
-</div>
+  </div>
+</div>