Ctrl+C doesn't dismiss dialogs in TUI

[kitlangton]

Escape dismisses dialogs, but Ctrl+C does not. Both are standard TUI conventions for canceling/closing.

[github-actions]

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Note on related issues: This issue might be related to:

• [FEATURE]:Add consistent ESC key support to close all popup dialogs #10623: Add consistent ESC key support to close all popup dialogs

For keyboard shortcut and keybind-related issues, please also check our pinned keybinds documentation: #4997

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