refactor: Connect all chatroomWidget clicks to friend list clicks

Remove using getGroupWidget, getFriendWidget and getChatForm from
ContentDialog.

src/widget/contentdialog.cpp

@@ -181,7 +181,8 @@ FriendWidget* ContentDialog::addFriend(int friendId, QString id)
         lastDialog->removeFriend(friendId);
 
     friendList.insert(friendId, std::make_tuple(this, friendWidget));
-    onChatroomWidgetClicked(friendWidget, false);
+    // FIXME: emit should be removed
+    emit friendWidget->chatroomWidgetClicked(friendWidget, false);
 
     return friendWidget;
 }
@@ -202,7 +203,8 @@ GroupWidget* ContentDialog::addGroup(int groupId, const QString& name)
         lastDialog->removeGroup(groupId);
 
     groupList.insert(groupId, std::make_tuple(this, groupWidget));
-    onChatroomWidgetClicked(groupWidget, false);
+    // FIXME: emit should be removed
+    emit groupWidget->chatroomWidgetClicked(groupWidget, false);
 
     return groupWidget;
 }
@@ -357,7 +359,10 @@ void ContentDialog::cycleContacts(bool forward, bool loop)
         GenericChatroomWidget* chatWidget = qobject_cast<GenericChatroomWidget*>(currentLayout->itemAt(index)->widget());
 
         if (chatWidget != nullptr && chatWidget != activeChatroomWidget)
-            onChatroomWidgetClicked(chatWidget, false);
+        {
+            // FIXME: emit should be removed
+            emit chatWidget->chatroomWidgetClicked(chatWidget, false);
+        }
 
         return;
     }
@@ -675,11 +680,6 @@ void ContentDialog::onChatroomWidgetClicked(GenericChatroomWidget *widget, bool
     widget->resetEventFlags();
     widget->updateStatusLight();
     updateTitle(widget);
-
-    if (widget->getFriend())
-        widget->getFriend()->getFriendWidget()->updateStatusLight();
-    else
-        widget->getGroup()->getGroupWidget()->updateStatusLight();
 }
 
 void ContentDialog::updateFriendWidget(FriendWidget *w, Status s)

src/widget/widget.cpp

@@ -1271,6 +1271,18 @@ void Widget::addFriendDialog(Friend *frnd, ContentDialog *dialog)
     connect(friendWidget, &FriendWidget::copyFriendIdToClipboard,
             this, &Widget::copyFriendIdToClipboard);
 
+    // Signal transmission from the created `friendWidget` (which shown in
+    // ContentDialog) to the `widget` (which shown in main widget)
+    // FIXME: emit should be removed
+    connect(friendWidget, &FriendWidget::chatroomWidgetClicked,
+            this, [=](GenericChatroomWidget *w, bool group)
+    {
+        Q_UNUSED(w);
+        emit widget->chatroomWidgetClicked(widget, group);
+    });
+    // FIXME: emit should be removed
+    emit widget->chatroomWidgetClicked(widget, false);
+
     Core* core = Core::getInstance();
     connect(core, &Core::friendAvatarChanged,
             friendWidget, &FriendWidget::onAvatarChange);
@@ -1301,6 +1313,19 @@ void Widget::addGroupDialog(Group *group, ContentDialog *dialog)
             this, SLOT(removeGroup(int)));
     connect(groupWidget, &GroupWidget::chatroomWidgetClicked,
             group->getChatForm(), &ChatForm::focusInput);
+
+    // Signal transmission from the created `groupWidget` (which shown in
+    // ContentDialog) to the `widget` (which shown in main widget)
+    // FIXME: emit should be removed
+    connect(groupWidget, &GroupWidget::chatroomWidgetClicked,
+            this, [=](GenericChatroomWidget *w, bool group)
+    {
+        Q_UNUSED(w);
+        emit widget->chatroomWidgetClicked(widget, group);
+    });
+
+    // FIXME: emit should be removed
+    emit widget->chatroomWidgetClicked(widget, false);
 }
 
 bool Widget::newFriendMessageAlert(int friendId, bool sound)