StartLiveData: add an InitializationAlgorithm tab

[Janik Zikovsky]

This is a request from Mathieu to make LiveData consistent with his workflow:

• Add a tab in StartLiveData GUI with another algorithm selector and list of properties.
  • In Mathieu's case, this sets up some properties used in a PropertyManager.
  • In general, it might load some common data that gets reused by the processing algorithm(s)?
  • The algorithm is optional.
• Add support in StartLiveData and related algorithms for this.
• The StartLiveData algorithm will run this InitializationAlgorithm only once, before the first call to LoadLiveData.
• The reset of the LiveData processing will occur normally.
• The GUI will remember the properties history of this InitializationAlgorithm.

[Janik Zikovsky]

Russell - you might want to check with Mathieu whether he still needs this feature, or if he can work without it.

[Nick Draper]

Moved at the end of release 2.2

[Nick Draper]

Moved to milestone 2.4

[Nick Draper]

Moved at the code freeze for release 2.4

[Russell Taylor]

This functionality will be folded into the main reduction interfaces rather than living directly in StartLiveData (see #5896).

[Peter Peterson]

The other solution seems much better anyhow.

[Stuart Campbell]

This ticket has been transferred to github issue ​6080