11377/fix/blank cover on edit book positioning (#11378)

* add class to make changes specificall on blank cover in edition edit

* shift cover so that it is centered in its box

Author: emggeorge

openlibrary/templates/books/edit/edition.html

@@ -167,7 +167,7 @@
     </div>
 
     <div class="formBackRight">
-        <div class="illustration">
+        <div class="illustration editEditionCover">
             $:render_template("covers/book_cover", book)
             $:render_template("covers/change", book)
         </div>

static/css/components/illustration.less

@@ -86,3 +86,8 @@
     height: auto;
   }
 }
+.editEditionCover {
+  .SRPCoverBlank {
+    left: 22px;
+  }
+}