Polishing and finishing multiplayer

[Dominux]

• [x] Redirect users back after redirecting them to login page
• [x] Get back ability to run project in a dev mode
• [x] Show button to enter game for a player 2 only when the game is started
• [ ] Show usernames on scores, in singleplayer usernames are "black player" and "white player" respectively
• [ ] Show which turn
• [x] If history contains records, load game (put stones, scores and decide whether player must wait for opponent or it's his turn now)
• [x] Hide "undo move" button in multiplayer mode
• [x] Add "home" button at EVERY PAGE
• [x] Add share room to player 2 (copy link to the room)
• [x] Fix all bugs