[Refactor] Input lagging in Login control

[FlorianJacta]

Description

The login control will lag when the application is deployed in some way. It will be difficult to write in the text inputs and make the login control unusable.

This seems to be related to #610

Acceptance Criteria

• Ensure new code is unit tested, and check code coverage is at least 90%.
• Propagate any change on the demos and run all of them to ensure there is no breaking change.
• Ensure any change is well documented.

Code of Conduct

• I have checked the existing issues.
• I am willing to work on this issue (optional)

[FredLL-Avaiga]

Is there a server where we could deploy an example provided by @FlorianJacta ?
@florian-vuillemot @FabienLelaquais ?