Adding support for Drag'n dropping panels between notebooks

Fixing bug in highlighting in variable panel

Adding support for drag'n dropping variable from global defined in configurations and resources to POU variable panel or body editor for declaring external variables
Adding support for drag'n dropping located variables from topology panel to configurations and resources variable panel for declaring global located variables

Adding support for using ESC key for closing custom grid cell editors

Disabling drag for modifying grid row size

Fixing bug conflict on tab selection between POU editor and Debug window of an instance of this same POU on Windows

Fixing bug in Debug with ToolTip for wire value disappearing on Windows