make whispers not disabled on clear

src/common/Channel.cpp

@@ -179,7 +179,8 @@ void Channel::disableAllMessages()
     for (int i = 0; i < snapshotLength; i++)
     {
         auto &message = snapshot[i];
-        if (message->flags.hasAny({MessageFlag::System, MessageFlag::Timeout}))
+        if (message->flags.hasAny({MessageFlag::System, MessageFlag::Timeout,
+                                   MessageFlag::Whisper}))
         {
             continue;
         }

src/common/Channel.hpp

@@ -15,7 +15,7 @@ namespace chatterino {
 
 struct Message;
 using MessagePtr = std::shared_ptr<const Message>;
-enum class MessageFlag : uint16_t;
+enum class MessageFlag : uint32_t;
 using MessageFlags = FlagsEnum<MessageFlag>;
 
 class Channel : public std::enable_shared_from_this<Channel>