Quick search content check back

app/src/main/java/com/hippo/ehviewer/ui/scene/GalleryListScene.java

@@ -557,6 +557,14 @@ public final class GalleryListScene extends BaseScene
             return;
         }
 
+        // Check duplicate
+        for (QuickSearch q: list) {
+            if (urlBuilder.equalsQuickSearch(q)) {
+                showTip(getString(R.string.duplicate_quick_search, q.name), LENGTH_SHORT);
+                return;
+            }
+        }
+
         final EditTextDialogBuilder builder = new EditTextDialogBuilder(context,
                 getSuitableTitleForUrlBuilder(context.getResources(), urlBuilder, false), getString(R.string.quick_search));
         builder.setTitle(R.string.add_quick_search_dialog_title);