refactor / reorganize UI code

[VoxBorealis]

With the addition of support for multiple premises, many additional UI elements had to be created. This has lead to the bloating of the home.js file, therefore the need for better organization & refactoring of the UI code has risen.

TODO:

• [x] Create a ui folder into ./src
• [x] Move blocks and home.js into ui
• [x] Split home.js into smaller subcomponents
• [x] Refactor registrationBlock