OutputPane: Add an id() for the settings

It was using the displayName for the key in the settings (visibility and
shortcut), which is annoying when changing the language.

Change-Id: Iffa784347c59389599c90f468dcba15834599c39
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/terminal/terminalpane.cpp

@@ -40,6 +40,7 @@ TerminalPane::TerminalPane(QObject *parent)
     : IOutputPane(parent)
     , m_selfContext("Terminal.Pane")
 {
+    setId("Terminal");
     setDisplayName(Tr::tr("Terminal"));
     setupContext(m_selfContext, &m_tabWidget);
     setZoomButtonsEnabled(true);