Show new words on board

[glowacki-dev]

Instead of using modal for approvals we could place new tiles on the board and ask for approval there. We'd still need to show new words list, but we can use info popup for this (it will be consistent with what people see when playing tiles).
This would also enable live preview of tiles being placed (just positions without revealing what's on tiles)

[pastpatryk]

We could also show blurred/blank tiles on the board when other players are placing their tiles