Fix report abuse breaking the chat box

[HarleyGilpin]

Closes #1061

Problem

After submitting (or cancelling) an abuse report, the reporter couldn't type in chat or press Enter for quick-chat until they relogged.

Root cause (client-side, from the 634 cache cs2 + void-client source)

• Opening report abuse in select-player mode runs cs2 246, which sets the report-mode varc 11 = 1 and removes the chat box key listener (if_setonkey(137:55, -1)) so keystrokes feed the report screen instead. Script 73 (the removed handler) is what processes all chat typing and Enter.
• The client's close script (cs2 675) only closes the modal. It never re-registers the listener, and the send path (cs2 135) never resets varc 11. Keyboard chat stays dead; relogging fixes it because listeners/varcs rebuild on login.
• The restore script is cs2 244 (re-registers script 73 on 137:55 via cs2 132, sets varc 11 = 0, clears the reported-name varc 24).

Fix

• Run cs2 244 (close_report_abuse) whenever the report_abuse interface closes.
• Close the interface server-side when the ReportAbuse instruction arrives (before validation — the client has already dismissed its side), keeping server interface state in sync and triggering the restore on every path (submit, cancel, X).

Testing

• New WorldTest asserts the interface closes and script 244 is sent after submitting a report; all existing ReportAbuseTest cases pass.
• Verified in the client: reported via right-click chat line, via the Report button, and cancelled without submitting, chat keeps working after each.