UI: Home Screen changes

[Sujithbn]

Reference: https://xd.adobe.com/view/21e1c3f7-f487-4f20-a28f-d292c1adba70-74b2/

sub tasks

• [x] Home Screen view
• [x] Remove tab screens
• [x] rearrange bottom screens
• [x] changes in header - add Logo, help and settings.(NOTE : help will open a url)
• [x] change “Download Id” button to floating button,

[Anil-kumar-Majji]

The above task of changes in Home screen as per new UI are done and raised PR( #552 ) and submitted for review.