Deck options without bridge

[Arthur-Milchior]

Thanks to @BrayanDSO I learned we were not supposed to have BridgeCommand anymore. So here I remove them in the deck options

[BrayanDSO]

Reference: ankidroid/Anki-Android#14361 (comment)

[dae]

Sorry for the delayed review. A couple of questions:

• If 'requireClose' and 'confirmDiscardChanges' are intended only to be used by the deck options as the comment implies, I think they need a more specific name.
• If they're intended to be used in other contexts in the future too, I think closeCurrentWindow might be a clearer name
• Did you consider using a simple JavaScript confirm() instead?