When click a widget save

## What
When clicking a widget in the widget list we call a new endpoint save.
Edit should not be reseted and should still be active after this call.
Page should not refresh basically.

## Why

# Definition of Done

Start at the widget list click handler and trace the new save endpoint described in the issue. Check how the edit state and page refresh are currently triggered. Done means clicking a widget saves without resetting the edit state and without refreshing the page.

Written by the indexing model from the issue text.