Work on plugin mechanism

Context actions have become normal actions in the pluginwidget so the widget knows abot them and
can easily do things like enable/disable.

pglab/plugin_support/MenuPath.h

@@ -2,17 +2,46 @@
 #define MENUPATH_H
 
 #include <QString>
-#include <boost/container/small_vector.hpp>
+#include <QVector>
+#include <vector>
 
 
+/// For a menu path we use a string very similar to a file path. Width however the addition of semicolons
+/// for specifying groups. So the following path
+///
+/// /File:Save
+///
+/// Specifies the File menu and the group Save within that menu while
+///
+/// /File/Export
+///
+/// Would specify the export sub menu of the file menu
+///
 class MenuPath {
 public:
 	MenuPath();
 	MenuPath(QString menu_path);
 
+
 private:
-	QString m_menuPath;
+	class Elem {
+	public:
+		QStringRef menu;
+		QStringRef group;
+
+		explicit Elem(QStringRef s)
+		{
+			auto p = s.split(':');
+			menu = p[0];
+			if (p.size() > 1) {
+				group = p[1];
+			}
+		}
+	};
+
+	std::vector<Elem> m_elems;
 };
 
 
+
 #endif // MENUPATH_H