Watches history

Nice idea - introduce watches history which would store all (or by user request "add to watches history", or only linked to debug beakpoints) states of a watched variable between debug sessions. For now I'm just coping values to some external text editor. Would be great if users will be able to inspect values of earlier debug sessions. Would be also nice to see the watches history when debugger is offline. For example to compare variables with website output after debug is finished.