WIP: Moved sources int src/, separated most of the source code from Perl.

The XS was left only for the unit / integration tests, and it links
libslic3r only. No wxWidgets are allowed to be used from Perl starting
from now.

src/slic3r/GUI/ConfigSnapshotDialog.hpp

@@ -0,0 +1,34 @@
+#ifndef slic3r_GUI_ConfigSnapshotDialog_hpp_
+#define slic3r_GUI_ConfigSnapshotDialog_hpp_
+
+#include "GUI.hpp"
+
+#include <wx/wx.h>
+#include <wx/intl.h>
+#include <wx/html/htmlwin.h>
+
+namespace Slic3r { 
+namespace GUI {
+
+namespace Config {
+	class SnapshotDB;
+}
+
+class ConfigSnapshotDialog : public wxDialog
+{
+public:
+    ConfigSnapshotDialog(const Config::SnapshotDB &snapshot_db, const wxString &id);
+    const std::string& snapshot_to_activate() const { return m_snapshot_to_activate; }
+
+private:
+    void onLinkClicked(wxHtmlLinkEvent &event);
+    void onCloseDialog(wxEvent &);
+
+    // If set, it contains a snapshot ID to be restored after the dialog closes.
+    std::string m_snapshot_to_activate;
+};
+
+} // namespace GUI
+} // namespace Slic3r
+
+#endif /* slic3r_GUI_ConfigSnapshotDialog_hpp_ */