pull out chat input into its own component, rename some stuff

components/chatinput.hpp

@@ -0,0 +1,23 @@
+#pragma once
+#include <gtkmm.h>
+
+class ChatInput : public Gtk::ScrolledWindow {
+public:
+    ChatInput();
+
+    void InsertText(const Glib::ustring &text);
+    Glib::RefPtr<Gtk::TextBuffer> GetBuffer();
+    bool ProcessKeyPress(GdkEventKey *event);
+
+private:
+
+    Gtk::TextView m_textview;
+
+public:
+    typedef sigc::signal<void, Glib::ustring> type_signal_submit;
+
+    type_signal_submit signal_submit();
+
+private:
+    type_signal_submit m_signal_submit;
+};