Summary multiplot improvements (#8598)

* Create multi summary plot from summary plot(s)
* Rearrange multi summary plot properties
* Enable source stepping toolbar for multi summary plot
* Automatically activate new summary plot when creating from data sources -> data vector tree
* Enable global key controls for switching data in summary and multi summary plots
* Update tooltip texts for summary plot toolbar

ApplicationLibCode/ProjectDataModel/Summary/RimSummaryPlotControls.h

@@ -0,0 +1,40 @@
+////////////////////////////////////////////////////////////////////////////////
+//
+//  Copyright (C) 2022     Equinor ASA
+//
+//  ResInsight is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
+//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+//  FITNESS FOR A PARTICULAR PURPOSE.
+//
+//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html>
+//  for more details.
+//
+/////////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+class RimSummaryPlotSourceStepping;
+class QKeyEvent;
+
+#include <QString>
+
+class RimSummaryPlotControls
+{
+public:
+    static bool handleKeyEvents( RimSummaryPlotSourceStepping* srcStepping, QKeyEvent* keyEvent );
+
+    static QString quantityNextKeyText();
+    static QString quantityPrevKeyText();
+    static QString caseNextKeyText();
+    static QString casePrevKeyText();
+    static QString otherNextKeyText();
+    static QString otherPrevKeyText();
+
+private:
+    RimSummaryPlotControls() = default;
+};