feat(emote-popup): automatically reload Twitch emotes (#5580)

src/widgets/helper/ChannelView.cpp

@@ -897,6 +897,11 @@ ChannelPtr ChannelView::channel()
     return this->channel_;
 }
 
+ChannelPtr ChannelView::underlyingChannel() const
+{
+    return this->underlyingChannel_;
+}
+
 bool ChannelView::showScrollbarHighlights() const
 {
     return this->channel_->getType() != Channel::Type::TwitchMentions;
@@ -976,6 +981,11 @@ void ChannelView::setChannel(const ChannelPtr &underlyingChannel)
             this->channel_->fillInMissingMessages(filtered);
         });
 
+    this->channelConnections_.managedConnect(underlyingChannel->messagesCleared,
+                                             [this]() {
+                                                 this->clearMessages();
+                                             });
+
     // Copy over messages from the backing channel to the filtered one
     // and the ui.
     auto snapshot = underlyingChannel->getMessageSnapshot();

src/widgets/helper/ChannelView.hpp

@@ -144,9 +144,20 @@ public:
     /// filter settings. It will always be of type Channel, not TwitchChannel
     /// nor IrcChannel.
     /// It's **not** equal to the channel passed in #setChannel().
+    /// @see #underlyingChannel()
     ChannelPtr channel();
 
-    /// Set the channel this view is displaying
+    /// @brief The channel this view displays messages for
+    ///
+    /// This channel potentially contains more messages than visible in this
+    /// view due to filter settings.
+    /// It's equal to the channel passed in #setChannel().
+    /// @see #channel()
+    ChannelPtr underlyingChannel() const;
+
+    /// @brief Set the channel this view is displaying
+    ///
+    /// @see #underlyingChannel()
     void setChannel(const ChannelPtr &underlyingChannel);
 
     void setFilters(const QList<QUuid> &ids);