Tab Navigation for Child configuration model

[jatindersingh93]

Fix tab order, start from entire popup, heading and end with close button
Focus should go back to the config button when hit closed
Focus should stay in the open dialog box

SC3685

Description

Types of changes

Checklist

• I have read the CONTRIBUTING doc
• I have checked that unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[codeclimate]

Code Climate has analyzed commit a5ac28d and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 25.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 23.8% (0.0% change).

View more on Code Climate.

[github-actions]

Coverage Report (Application)

Totals
Statements:	70.67% ( 53 / 75 )
Methods:	62.5% ( 5 / 8 )
Lines:	81.63% ( 40 / 49 )
Branches:	44.44% ( 8 / 18 )

[github-actions]

Coverage Report (Frontend)

Totals
Statements:	18.38% ( 751 / 4085 )
Methods:	17.95% ( 138 / 769 )
Lines:	22.66% ( 530 / 2339 )
Branches:	8.5% ( 83 / 977 )