There was a hardcoded exception to never reset caret blinking if Ctrl
(`command`) was pressed. This broke on Ctrl+arrows,
Ctrl+Home/End/PgUp/PgDn, Ctrl+C, Ctrl+V, Ctrl+Backspace and Ctrl+Delete.
Resetting blink only for those Ctrl operations that actually touch the
cursor somehow would clutter the code a lot, so I removed the check
entirely. That means we now also reset blinking on unrelated operations
like Ctrl+O, but that seems pretty harmless. I actually like the
additional bit of feedback even in that case (most of these will
immediately defocus the editor anyway, so you never see it).
Fixes#18100