[Outreachy Task Submission] Remove Extra Focus From Add Buttons On Keyboard Navigation

[Aquilaafuadajo]

Description
Currently the add new buttons behave weirdly when navigating using just keyboard. The button has to be tabbed twice before it responds to the enter event.

Why does this happen?
This happens because the mizima-client-buttons in this cases are router links and router links come with their own focus when tabbed into, so this focus + the buttons default focus results in tabbing twice before the button responds to the enter event.

Fix
Set tabindex to -1 on mizima-client-buttons when it's being used as a router link to prevent this extra focus.

[MugoBrian]

Hello @Aquilaafuadajo . Could you include steps to reproduce this issue? I would love to check out the issue if it's similar to the one I found.

[MugoBrian]

No need I have seen the steps in the PR.