MUON: Changes to Settings tab.

[Robert Whitley]

The muon scientists asked for a couple of changes to the settings tab.

1) If auto-scale is turned off then it should take into account the y axis values and not ignore them.

2) Auto-update + Overwrite should be the default option.

3) Tab order needs changing to be more sensible.

4) Validation to y values so it doesn't crash when '-' is entered.

[Robert Whitley]

Grouping workspaces involves 'refreshing' the plot. This can mean that it loses some of its formatting. For example in the case of auto-scale. This is done before grouping the raw workspace with the rest of the workspaces. The reason it works after re-plotting is because the raw workspace has already been created and therefore doesn't need grouping the second time around.

[Robert Whitley]

I also need to edit the tab order so that the forms can easily be populated.

[Robert Whitley]

After editing the tab order I've noticed it isn't easy to fill out the form because each option updates the plot when the user hits tab. I will change these signals to only update if the after the text edit the user hits enter on the keyboard.

[Robert Whitley]

Refs #4581. Change the settings tab and how it works.

Changeset: 04d75d0180e36075e7e3b94cf077eb95a9814d67

[Anders Markvardsen]

This works and verified by muon scientists

[Stuart Campbell]

This ticket has been transferred to github issue ​5428