Improve accessibility

[lukasmatta]

There is a room for improvement when it comes to accessibility. Proper accessibility testing should be performed using both manual testing and automatic tools such as Axe. Here is the list of issues I found during brief manual testing:

• some components use px unit for font size instead of rem
• complex components such as ButtonToggle, or Tabs cannot be controlled using keyboard
• some texts do not satisfy the minimum contrast requirement, e.g. right info text in the autocomplete component, input hint text
• label elements are not referencing related input elements using either for attribute or being wrapped in it

Tasks

• Perform accessibility test using both manual testing and automatic tool and create a report
• Fix accessibility issues
• Perform a control test and compare its results with the previous one