add(ui/ux): search all open requests from the import dialog

static/index.html

@@ -232,6 +232,10 @@
           <label class="muted"
             >Ziel-Library <select id="quick-library"></select
           ></label>
+          <label class="muted"
+            >Offene Anfragen
+            <input id="quick-req-filter" placeholder="nach Titel, Autor, Serie filtern…" />
+          </label>
           <div id="quick-scroll">
             <div id="quick-open-requests"></div>
             <div id="quick-results" class="cards view-list"></div>