fix: add selectedPosition style to the Add Page Number position selec…

…tor default value

src/main/resources/templates/misc/add-page-numbers.html

@@ -87,7 +87,7 @@ <h2 th:text="#{addPageNumbers.header}"></h2>
 									<div class="pageNumber" id="5" style="top: 50%; left: 50%;">5</div>
 									<div class="pageNumber" id="6" style="top: 50%; left: 90%;">6</div>
 									<div class="pageNumber" id="7" style="top: 90%; left: 10%;">7</div>
-									<div class="pageNumber" id="8" style="top: 90%; left: 50%;">8</div>
+									<div class="pageNumber selectedPosition" id="8" style="top: 90%; left: 50%;">8</div>
 									<div class="pageNumber" id="9" style="top: 90%; left: 90%;">9</div>
 								</div>
 							</div>