Created double click shortcuts for the treenode panel. Doublick clicking now leads to edit, vote, and statistics panel depending on the session state
refactored the same double click shortcut to a method called DoubleClickShortCutSession so that each method does one job
added appropriate comments
removed unnecessary lines which disable all the buttons. (Avoiding double calling)
Moved doubleClickOpenSession to overviewTreePanel
Merge pull request #260 from TheTeam8s/feature-doubleclick-shortcuts-advanced

Feature doubleclick shortcuts advanced