Switcher Components when removed are not visible anymore

[petruki]

Describe the bug
When setting up a Switcher component, if a component is removed, the UI does not update the list of available components, though it can be refreshed typing the removed component.

To Reproduce
Steps to reproduce the behavior:

1. Go to any Switcher detail
2. Click on edit
3. Remove a component

Expected behavior
The removed component should be displayed in the list of available components