QTIPlot to allow repeated monitoring of a DAE

[Nick Draper]

QTIplot (probably through a specific button) should allow a workspace to be repeatedly loaded with data from a DAE. This should refresh the data every n (specified by the user default:5?) seconds.

If a refresh is scheduled and the previous refresh has not been completed then the scheduled refresh should be missed.

This refreshed data needs to be updated in all data structures to allow a single spectrum graph to be updated (2d graphs would be a bonus).

The idea here is that a user can create a graph of a monitor or detector during an experiment and watch the counts grow over time.

[Roman Tolchenov]

(In [1294]) Loading a workspace from DAE via Load button in Qtiplot gives an option to set the frequency of updating the data. 1D and 2D plots are updated automatically. re #204

[Stuart Campbell]

This ticket has been transferred to github issue ​1052