Undo project

[rozyczko]

Description

Added Undo/Redo functionality, tied to the GUI taskbar components.
This works in all perspectives and reverses any user input in any textfield.

This PR is against main, since I think the feature is important to be added to the next release.

The PR has a bunch of unrelated changes coming from rebasing against the recent main.

How Has This Been Tested?

Tested locally, added a number of unit tests.

Review Checklist:

[if using the editor, use [x] in place of [ ] to check a box]

Documentation (check at least one)

• There is nothing that needs documenting
• Documentation changes are in this PR
• There is an issue open for the documentation (link?)

Installers

• There is a chance this will affect the installers, if so
  • Windows installer (GH artifact) has been tested (installed and worked)
  • MacOSX installer (GH artifact) has been tested (installed and worked)
  • Wheels installer (GH artifact) has been tested (installed and worked)

Licensing (untick if necessary)

• The introduced changes comply with SasView license (BSD 3-Clause)

[krzywon]

Overall, this is looking very promising, but I'm seeing some undo/redo that aren't repeatable. I'll take a deeper dive into the code soon, but I did make a couple of suggestions.

After changing the scale value to 0.5, then clicking compute:

Clicking undo shows no plot changes, but the scale value changes:

Undo again and the plot changes:

Redo twice to get back to the head of the stack and the scale is back to 0.5, but the plots aren't updated: