supports Windows key for global accelerators
Merge branch 'master' of https://github.com/cbucher/console
boost 1.53
restart is no longer needed for these appearance settings:
Caption
Resizable
Border
Taskbar button
Re-add tray icon if Windows Explorer restarts.
fix some buildings
application can be moved using the extended frame area
(unused space of the toolbar and the tabs)
double click for maximizing or restoring can only be used in tabs
(the toolbar doesn't provide a notify for left double click)