Suppress multiline paste warning in bracketed paste mode
Feature idea (as an advanced config option): Suppress warning about multiline paste when in bracketed paste mode.
Rationale: You can suppress it permanently (not good against accidental pastes), or when not at shell prompt (but then you can still be in a python interpreter, or ssh'd to a remote host without shell integration, or whatever where it's harmful).
Bracketed paste mode is typically implemented by fullscreen apps, mostly editors where it's harmless to paste to. Of course these apps also have special command modes where it can cause harm, but apps that implement bracketed paste mode can be expected to safely handle a newline that's part of a paste.