Fix grid config and add grid size to lightgames

Fixes #14
Change styling and remove of some settings

Round borders and game paths in game settings removed
Buildings in setup removed
Fix working login

Also replaced disable_login with password set to None.
Password is set by config_pwd in config.json
Avoid crash if config.json doesn't exist
Improve error handling

Fixes #11
Fixes #15
Keep queue placement when updating page

Fixes #31
Fix crash in game_over preventing new games

And send game tied message to all clients (fixes #32)
Disable 'join queue' when playing
Fix centering in boxes