Handle loading states gracefully

[UsamaHameed]

Description

The app should handle loading states more gracefully. The UI should reflect that things are happening in the background and that the user should wait a bit more. Some parts of the code are heavily dependant on expensive network requests to be completed JIT.

Motivation

For better UX.

Acceptance Criteria

• All loading states should be handled
• Some placeholder should be shown instead when the app state is loading
• TBD

Additional Information

• For example: skeleton screens: https://css-tricks.com/building-skeleton-screens-css-custom-properties/

[sridharmeganathan]

Lisk desktop v2.x.x is performing good due to the improvements in Lisk Service, as a result the pages are loading gracefully.

[ManuGowda]

This issue has been address with v3 implementation