do not count unread of muted conversation in count of total unread

Relates #1840

app/sql.js

@@ -224,8 +224,7 @@ function openAndMigrateDatabase(filePath, key) {
     keyDatabase(db, key);
     switchToWAL(db);
     migrateSchemaVersion(db);
-    // Because foreign key support is not enabled by default! // actually, Session does not care
-    // db.pragma('foreign_keys = ON');
+    db.pragma('secure_delete = ON');
 
     return db;
   } catch (error) {

ts/state/selectors/conversations.ts

@@ -179,7 +179,11 @@ export const _getLeftPaneLists = (
       directConversations.push(conversation);
     }
 
-    if (unreadCount < 9 && conversation.unreadCount > 0) {
+    if (
+      unreadCount < 9 &&
+      conversation.unreadCount > 0 &&
+      conversation.currentNotificationSetting !== 'disabled'
+    ) {
       unreadCount += conversation.unreadCount;
     }