Terminal: Add support for copy (OSC52)

Allows terminal apps like vim to set the clipboard, even from inside
an ssh/remote shell.

Change-Id: I1d068737ef65bb4541c3fc9c43870986865f1b45
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/plugins/terminal/shellintegration.cpp

@@ -179,4 +179,9 @@ void ShellIntegration::prepareProcess(Utils::Process &process)
     process.setEnvironment(env);
 }
 
+void ShellIntegration::onSetClipboard(const QByteArray &text)
+{
+    setClipboardAndSelection(QString::fromLocal8Bit(text));
+}
+
 } // namespace Terminal

src/plugins/terminal/shellintegration.h

@@ -23,6 +23,8 @@ public:
     void onBell() override;
     void onTitle(const QString &title) override;
 
+    void onSetClipboard(const QByteArray &text) override;
+
     void prepareProcess(Utils::Process &process);
 
 signals: