Fix instanceof failed on iframe editor

[bangank36]

What?

Address #54378

Why?

Since blocks are rendered inside iframe, which has its own environment with its own globals, the check

gutenberg/packages/components/src/date-time/time/index.tsx

Line 130 in 6999011

if ( ! ( event.target instanceof HTMLInputElement ) ) {

will be against the parent window not the iframe, thus it returns false and stop the Time inputs to fire properly

How?

TBA

Testing Instructions

For quick testing purpose, the Time component is included in ButtonEdit

• Add a Button
• Modify the Time inputs
• Watch the value changes upon onChange

Testing Instructions for Keyboard

Screenshots or screencast

Kapture.2023-09-20.at.11.05.14.mp4

cc: @ciampo @Honkitonkie

[bangank36]

Closed in favor of #54669