Change overwrite behaviour of LoadDialog when user has specified a default output WS name

[Peter Parker]

Run the following in the Python script window:

LoadDialog("MAR11001.raw",
           OutputWorkspace="SomeSuggestedWsName", 
           Enable="Filename,OutputWorkspace")

The user's suggested default for the OutputWorkspace name is automatically overridden by the dialog to be "MAR11001". Ideally, if the user has specified a default then we should be using it.

[Nick Draper]

bulk move to assigned at the into of the triage step

[Federico Montesino Pouzols]

fix doc - disable options, re #8456

Changeset: 5b3178a54d784dba0d8d12e062da6fb8c880184b

[Federico Montesino Pouzols]

use OutputWorkspace property, don't override with suggestion, re #8456

Changeset: 9896565988a2b45033a643ada695210c6e5a25dd

[Federico M Pouzols]

To fix this the name suggestion slot of LoadDialog has been changed. It now checks if the property 'OutputWorkspace' has ben set. I also corrected the LoadDialog Python documentation.

To test:

• Run the command given in the example (or similar):

  LoadDialog("MAR11001.raw",  OutputWorkspace="SomeSuggestion", Enable="Filename,OutputWorkspace")
  

• The load dialog should use 'SomeSuggestedWsName' as OutputWorkspace.

Note: I found the behavior of LoadDialog a bit confusing when enabling and disabling other options. For example, try not to enable 'OutputWorkspace', the filename seems to be ignored. I think there are issues in mantid/simpleapi.py that might need checking/fixing.

[Dan Nixon]

Merge remote-tracking branch 'origin/bugfix/8456_prevent_overwrite_of_output_ws_name_in_loaddialog'

Full changeset: ​0a42593060d580ba07b4e08e533444bd6d17335a

[Stuart Campbell]

This ticket has been transferred to github issue ​9300