Add a Send button that can be used to send messages (#4607)

This button is disabled by default, and can be enabled with the "Show send message button" setting.

src/singletons/Settings.hpp

@@ -2,13 +2,13 @@
 
 #include "BaseSettings.hpp"
 #include "common/Channel.hpp"
+#include "common/enums/MessageOverflow.hpp"
 #include "common/SignalVector.hpp"
 #include "controllers/logging/ChannelLog.hpp"
 #include "singletons/Toasts.hpp"
 #include "util/RapidJsonSerializeQString.hpp"
 #include "util/StreamerMode.hpp"
 #include "widgets/Notebook.hpp"
-#include "widgets/splits/SplitInput.hpp"
 
 #include <pajlada/settings/setting.hpp>
 #include <pajlada/settings/settinglistener.hpp>
@@ -509,6 +509,8 @@ public:
     IntSetting lastSelectChannelTab = {"/ui/lastSelectChannelTab", 0};
     IntSetting lastSelectIrcConn = {"/ui/lastSelectIrcConn", 0};
 
+    BoolSetting showSendButton = {"/ui/showSendButton", false};
+
     // Similarity
     BoolSetting similarityEnabled = {"/similarity/similarityEnabled", false};
     BoolSetting colorSimilarDisabled = {"/similarity/colorSimilarDisabled",

src/singletons/Updates.cpp

@@ -11,6 +11,7 @@
 #include "util/CombinePath.hpp"
 #include "util/PostToThread.hpp"
 
+#include <QApplication>
 #include <QDesktopServices>
 #include <QMessageBox>
 #include <QProcess>