Focus on the first modal input when renaming a workspace

[gtsiolis]

Problem to solve

Following the changes in #5695 that re-introduced the ability to rename the workspace context description, however, triggering the modal does not focus on the first input element within the modal.

In general, for modals it's a good practice to auto-focus on the first focusable item. 💡

Proposal

When triggering the modal to rename a workspace, focus on the first and single modal input.

The scope of this issue is limited to the workspace rename modal but could be nice if all modals inherited this behavior. 🗺️

[iQQBot]

/assign