- fixed issue where the context menu with add/attach items was not available
for empty list or when empty space was clicked; in the latter case I also clear
the selections
- added ability to launch the context menu by using the windows properties button
- moved context menu to the designer; changed code to show/hide the relevant menu
items instead of adding new ones each time the context menu opens
- added icon to the context menu item Properties
- fixed button layout (part of CA-100083), then removed separators between buttons
because when they wrap it looks a bit strange
- fixed some weird cross-threading exception (could not reproduce reliably)
- renamed one or two class members and tidied up the button event handlers
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>