Merge pull request #45 from zhykzhykzhyk/kokoro

Kokoro: check valid after reveal
Keep original view after append.
Add no_invite mode
Command help tune
New command: ob
Add timeout to Dialogs
Add delay for input
Reject instead ignore the invitation in no_invite mode
Add GUI for no_invite mode
Command 'invite': message tune
remove tbproperty
NoInviteButton: always update
Save volume in user settings
relocate controls in game screen
No crashreport if program interrupt by user
Use new player after do_switch
NoInviteButton refactoring
ConfirmBox: create label once only
use OptionButton in GameCharacterPortrait