[a11y] 11.2.5.3 Label in the name

[tschiebel]

audit: https://infinite.owncloud.com/s/QtwuiGHikwFjozV

https://www.etsi.org/deliver/etsi_en/301500_301599/301549/03.02.01_60/en_301549v030201p.pdf
https://github.com/BIK-BITV/BIK-App-Test/tree/main/Pr%C3%BCfschritte/de

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• The "Cancel" and "Save" buttons have visual labels that are not included in the accessible name. Instead, variable names appear to be used as accessible names.