Ignore files starting with a dot when fetching local comic images, and improve local comic delete logic.

lib/foundation/local.dart

@@ -5,6 +5,7 @@ import 'package:path_provider/path_provider.dart';
 import 'package:sqlite3/sqlite3.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/comic_type.dart';
+import 'package:venera/foundation/favorites.dart';
 import 'package:venera/foundation/log.dart';
 import 'package:venera/network/download.dart';
 import 'package:venera/pages/reader/reader.dart';
@@ -346,6 +347,10 @@ class LocalManager with ChangeNotifier {
             comic.cover) {
           continue;
         }
+        //Hidden file in some file system
+        if(entity.name.startsWith('.')) {
+          continue;
+        }
         files.add(entity);
       }
     }
@@ -439,9 +444,20 @@ class LocalManager with ChangeNotifier {
     downloadingTasks.first.resume();
   }
 
-  void deleteComic(LocalComic c) {
+  void deleteComic(LocalComic c, [bool removeFileOnDisk = true]) {
-    var dir = Directory(FilePath.join(path, c.directory));
+    if(removeFileOnDisk) {
-    dir.deleteIgnoreError(recursive: true);
+      var dir = Directory(FilePath.join(path, c.directory));
+      dir.deleteIgnoreError(recursive: true);
+    }
+    //Deleting a local comic means that it's nolonger available, thus both favorite and history should be deleted.
+    if(HistoryManager().findSync(c.id, c.comicType) != null) {
+      HistoryManager().remove(c.id, c.comicType);
+    }
+    assert(c.comicType == ComicType.local);
+    var folders = LocalFavoritesManager().find(c.id, c.comicType);
+    for (var f in folders) {
+      LocalFavoritesManager().deleteComicWithId(f, c.id, c.comicType);
+    }
     remove(c.id, c.comicType);
     notifyListeners();
   }