OutputPane: Use setter for priority and fix default visibility

Do not show the buttons of output views with priority < 0 (instead of
only == -1). Reduce the number of buttons that are shown by default to
the essential ones.

Change-Id: I5b44f18537b3033ce9d616f044a8b54b76988783
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/terminal/terminalpane.cpp

@@ -42,6 +42,8 @@ TerminalPane::TerminalPane(QObject *parent)
 {
     setId("Terminal");
     setDisplayName(Tr::tr("Terminal"));
+    setPriorityInStatusBar(20);
+
     setupContext(m_selfContext, &m_tabWidget);
     setZoomButtonsEnabled(true);
 
@@ -350,11 +352,6 @@ QList<QWidget *> TerminalPane::toolBarWidgets() const
     return widgets << m_openSettingsButton << m_lockKeyboardButton << m_escSettingButton;
 }
 
-int TerminalPane::priorityInStatusBar() const
-{
-    return 50;
-}
-
 void TerminalPane::clearContents()
 {
     if (const auto t = currentTerminal())

src/plugins/terminal/terminalpane.h

@@ -27,7 +27,6 @@ public:
 
     QWidget *outputWidget(QWidget *parent) override;
     QList<QWidget *> toolBarWidgets() const override;
-    int priorityInStatusBar() const override;
     void clearContents() override;
     void visibilityChanged(bool visible) override;
     void setFocus() override;