Replacing progress view with progress widget

[andreas-el]

Replace LegendView and ProgressView with a simple ProgressWidget.

Visually the end result should be the same, but the complexity underneath should be greatly simplified. Now base_run_model will calculate the necessary numbers once, and the widget will use these for drawing the components.

If anything, the new code seems crisper in the text, and also does not shave off the very left side of the green finished label marker.

New

Old

• [x] PR title captures the intent of the changes, and is fitting for release notes.
• [x] Added appropriate release note label
• [x] Commit history is consistent and clean, in line with the contribution guidelines.
• [x] Make sure tests pass locally (after every commit!)

When applicable

• [ ] When there are user facing changes: Updated documentation
• [ ] New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• [ ] Large PR: Prepare changes in small commits for more convenient review
• [ ] Bug fix: Add regression test for the bug
• [ ] Bug fix: Create Backport PR to latest release

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 86.53%. Comparing base (77fa511) to head (2ec8244). Report is 7 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8152 +/- ## ========================================== + Coverage 76.93% 86.53% +9.60% ========================================== Files 383 382 -1 Lines 23813 23749 -64 Branches 625 628 +3 ========================================== + Hits 18320 20552 +2232 + Misses 5412 3124 -2288 + Partials 81 73 -8 ```

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