Move function changeView() from bean GenericTreeBean to class GuiTreeNode and rename it findSubTreeNodeByGeneric().
Remove useless method getChildTreeNode() from class GuiTreeNode.
Small refactoring of class GuiTreeNide.
Small refactoring of GenericTreeBean.
Refactoring of bean GenericBean.
Remove useless method isMeta() from GenericGean.
Merge branch 'myadmin' into stable
Merge branch 'stable'