find/replace dialogue:Transform slashes checkbox

[jlhey]

It's checked or unchecked status can not be keeped when dialogue is reopened..

[zufuliu]

Fixing Issue #783 changed backslash handing: it's only checked when new search string contains escape sequences. Can you give steps (and screenshots) to reproduce undesired behavior?

[jlhey]

I hope it could keep the last status(Notepad3 Emeditor) instead of changing automatically everytime.
This will be more convenient for frequent manual input of escape charaters.