code refactor & sync bugfixes

renderer/index.html

@@ -103,6 +103,13 @@
             <button class="button" id="btn-open-files" data-t="settings.openFiles"></button>
           </div>
         </div>
+        <div class="form-card">
+          <h2 data-t="settings.hashCache"></h2>
+          <p class="subtitle" data-t="settings.hashCacheHint"></p>
+          <div class="form-actions">
+            <button class="button danger" id="btn-clear-hash-cache" data-t="settings.clearHashCache"></button>
+          </div>
+        </div>
       </section>
 
       <section id="view-lansync" class="view">