8a25ec66f3
The tests output contained following warning:
```
console.warn
Th: Table headers must have an accessible name. If the Th is intended to be visually empty, pass in screenReaderText. If the Th contains only non-text, interactive content such as a checkbox or expand toggle, pass in an aria-label.
```
This fixes the warning by adding an `aria-label` to every empty table heading cell.
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| .. | ||
| formComponents | ||
| steps | ||
| validators | ||
| CreateImageWizard.js | ||
| CreateImageWizard.scss | ||
| ImageCreator.js | ||