Make actions at the bottom of a nuxeo-data-grid card usable with keyboard only

related to WCAG 2.1 level A criteria 2.1.1: Keyboard
https://www.w3.org/TR/WCAG21/#keyboard

Make actions at the bottom of a nuxeo-data-grid card usable with keyboard only

AC

• Using the keyboard, I can access the actions at the bottom of a nuxeo-data-grid card with keyboard only
  • when a particular action is active, it receives focus so that I can understand which element I am interacting with
  • I can interact with each action with the keyboard only (activate or deactivate)
• I can navigate within these actions using standard methods (tab or arrow keys)

Location

• "Search results" section

Recommendation to fix
RULE :
Functionality MUST be available using the keyboard, unless the functionality cannot be accomplished in any known way using a keyboard.

HOW TO FIX
Fix this issue by ensuring the component can be used by the keyboard OR by providing a conformant alternate functionality method for the action

REFERENCE
Aria grid pattern
Deque University:https://dequeuniversity.com/class/input-methods2/keyboard-input/functionality

BACKGROUND
Some people cannot use a mouse due to vision or motor disabilities. Content that can be operated with a mouse must also be made operable with a keyboard. When content is operable through a keyboard, it becomes operable by a variety of assistive technologies such as speech input software, sip-and-puff software, on-screen keyboards, scanning software, and alternate keyboards.