Adapt UI according to proposal

[Ade-kola]

Expected behavior

• Modal border radius should be 16px.

• Spacing between modal title and subtext should be 16px. There is an alignment inconsistency with the "Signed message" and the "input view".

• Only page titles should be 28px , all other page titles should be 24px, check the account, transactions, network, and blocks domain.

• Account name and address should be centralized with avatar. Currently the wallet name and address are at the top aligned. And when an account does not have a name the wallet address should be centralized with the avatar as well.

• The spacing between the account name and wallet address should be reduced to 4px and they should be centralized with the avatar.
  

• The "back to wallet" button should be a tertiary button (just a text in Lisk primary color).
  

• Please review the account addition flow based on this flow. Check the spacing, text colors...
  

• Update the staking modal to the specs of this design (font size,font colors, spacing).

• All empty states description/subtexts below the illustration should be 16px regular.
  

Error message

• All error message should show beneath the input field as a text and not as a banner. Check here

Error fallback UI
When there’s an error loading the app anytime I open it, the error fallback UI should not take the whole desktop app, users should still be able to see their nav bars and top nav. As the error might be from a particular network and not necessarily all the app. So this way, users are able to change the network. Design