Polishing and finishing multiplayer

[Dominux]

• Redirect users back after redirecting them to login page
• Get back ability to run project in a dev mode
• 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
• If history contains records, load game (put stones, scores and decide whether player must wait for opponent or it's his turn now)
• Hide "undo move" button in multiplayer mode
• Add "home" button at EVERY PAGE
• Add share room to player 2 (copy link to the room)
• Fix all bugs