Currently, when one clicks "Review changes" or "Preview" after editing a large page, they have no choice but to wait for the process to load.
Clicking the "X" or "<" does nothing.
On some of the most high-profile pages, like Donald Trump, this can lead to timeouts more than 50% of the time, with no way to stop them. This is incredibly frustrating.
Please add a simple button (or make the existing ones work) to stop loading a review or preview of changes.