Upgrade Vaadin to 14.10.4 and Flow to 2.9.5

[mvysny]

Description

Upgrade to Vaadin 14.10.4 and Flow 2.9.5. Newer flow contains fix for https://github.com/vaadin/flow/issues/6965#issuecomment-1649473575

Type of change

• [x] Bugfix
• [ ] Feature

Checklist

• [x] I have read the contribution guide: https://vaadin.com/docs/latest/guide/contributing/overview/
• [x] I have added a description following the guideline.
• [x] The issue is created in the corresponding repository and I have referenced it.
• [ ] I have added tests to ensure my change is effective and works as intended.
• [ ] New and existing tests are passing locally with my change.
• [x] I have performed self-review and corrected misspellings.

Additional for Feature type of change

• [ ] Enhancement / new feature was discussed in a corresponding GitHub issue and Acceptance Criteria were created.