🎨 [Frontend] App Mode: Pop up instructions if any

[odeimaiz]

What do these changes do?

In order to make the Instructions in the App Mode more visible, we decided to face the user with them when she gets to a step with them.

Related issue/s

related to https://github.com/ITISFoundation/osparc-issues/issues/1309

How to test

Dev-ops checklist

• [ ] No ENV changes or I properly updated ENV (read the instruction)

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[odeimaiz]

For the Release Notes: