#2225 Outlook-style reminder popup window

[Alexandre]

Have a popup window showing up when a reminder was set and it is time to be triggered. Have some kind of window like for outlook calendar events, where it is possible to postpone the reminder or to dismiss it. Because now the nodes with a reminder are flashing, but if we on another tab or another location on the map we may not see it and then we are not reminded. Also it would be nice to be able to trigger a script upon a reminder, maybe this is already possible...?