refactor(widget): make AboutFriendForm use FriendWidget as parent

src/widget/friendwidget.cpp

@@ -287,7 +287,7 @@ void FriendWidget::showDetails()
     const auto frnd = chatroom->getFriend();
     const auto iabout = new AboutFriend(frnd, &Settings::getInstance());
     std::unique_ptr<IAboutFriend> about = std::unique_ptr<IAboutFriend>(iabout);
-    const auto aboutUser = new AboutFriendForm(std::move(about), Widget::getInstance());
+    const auto aboutUser = new AboutFriendForm(std::move(about), this);
     connect(aboutUser, &AboutFriendForm::histroyRemoved, this, &FriendWidget::friendHistoryRemoved);
     aboutUser->show();
 }