Rework the project settings.

This has still a few missing things, but this enough to start getting
some feedback. Missing are non qt projects, a solution for the
runconfiguration, a missing black line between the treeview on top and
the project settings at the bottom. Some flickering with removing/adding
widgets to the QScrollArea and not showing the expanded widget if the
Details button is right at the bottom.

src/plugins/genericprojectmanager/genericmakestep.h

@@ -73,6 +73,7 @@ public:
     GenericMakeStepConfigWidget(GenericMakeStep *makeStep);
     virtual QString displayName() const;
     virtual void init(const QString &buildConfiguration);
+    virtual QString summaryText() const;
 private slots:
     void itemChanged(QListWidgetItem*);
     void makeLineEditTextEdited();