Merge global settings and accounts into a pagedialog

Also split external tools into it's own page

gui/pages/BasePageProvider.h

@@ -17,6 +17,7 @@
 
 #include "BasePage.h"
 #include <memory>
+#include <functional>
 
 class BasePageProvider
 {
@@ -25,4 +26,44 @@ public:
 	virtual QString dialogTitle() = 0;
 };
 
+class GenericPageProvider : public BasePageProvider
+{
+	typedef std::function<BasePage *()> PageCreator;
+public:
+	explicit GenericPageProvider(const QString &dialogTitle)
+		: m_dialogTitle(dialogTitle)
+	{
+	}
+
+	QList<BasePage *> getPages() override
+	{
+		QList<BasePage *> pages;
+		for (PageCreator creator : m_creators)
+		{
+			pages.append(creator());
+		}
+		return pages;
+	}
+	QString dialogTitle() override { return m_dialogTitle; }
+
+	void setDialogTitle(const QString &title)
+	{
+		m_dialogTitle = title;
+	}
+	void addPageCreator(PageCreator page)
+	{
+		m_creators.append(page);
+	}
+
+	template<typename PageClass>
+	void addPage()
+	{
+		addPageCreator([](){return new PageClass();});
+	}
+
+private:
+	QList<PageCreator> m_creators;
+	QString m_dialogTitle;
+};
+
 typedef std::shared_ptr<BasePageProvider> BasePageProviderPtr;