AutoTest: Ask for runnable if determination failed

There are several complex project layouts that lead to failing
to determine the correct runnable for tests.
If this happens prompt the user for the runnable to use instead
of performing wild guesses or blindly using a wrong one.

Task-number: QTCREATORBUG-17882
Task-number: QTCREATORBUG-18922
Task-number: QTCREATORBUG-18932
Change-Id: I1575f310c450e56c087f1e689d0fc7dfb0cd0bef
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

src/plugins/autotest/testrunner.h

@@ -28,10 +28,17 @@
 #include "testconfiguration.h"
 #include "testresult.h"
 
+#include <QDialog>
 #include <QFutureWatcher>
 #include <QObject>
 #include <QProcess>
 
+QT_BEGIN_NAMESPACE
+class QComboBox;
+class QDialogButtonBox;
+class QLabel;
+QT_END_NAMESPACE
+
 namespace ProjectExplorer {
 class Project;
 }
@@ -77,5 +84,23 @@ private:
     QMetaObject::Connection m_buildConnect;
 };
 
+class RunConfigurationSelectionDialog : public QDialog
+{
+    Q_OBJECT
+public:
+    explicit RunConfigurationSelectionDialog(const QString &testsInfo, QWidget *parent = nullptr);
+    QString displayName() const;
+    QString executable() const;
+private:
+    void populate();
+    void updateLabels();
+    QLabel *m_details;
+    QLabel *m_executable;
+    QLabel *m_arguments;
+    QLabel *m_workingDir;
+    QComboBox *m_rcCombo;
+    QDialogButtonBox *m_buttonBox;
+};
+
 } // namespace Internal
 } // namespace Autotest