Tweak frontend

[dasvas]

Make changes in the fronted, align with the mockups.

• [x] Tab names - Home -> Add KPI, gateKeeper KPIs List (will be moved) -> Define KPI, Barchart (will be moved) -> Data Dashboard
• [x] Field names - as in the mockup
• [x] Headers - as in the mockup
• [x] Circles: remove "latest update", just use KPI name and "enter circle"
• [x] Delete "Archived at", "Created at" from the definition form

Mockups to follow: https://www.figma.com/file/qWHQU2wVaihXIyPaEp02ow/Add-Value-Mockup?type=design&node-id=48-1425&mode=design&t=qF1HRQ5HWT8nJjmp-0

[dasvas]