#1981 Autocompletion list box still visible on macOS 10.13

[Chinh Nguyen]

On macOS 10.13 High Sierra, the autocompletion list box is emptied but stays visible when pressing delete or escape and there doesn't seem any way to dismiss the list box once this happens. The list box is properly dismissed when selecting a list item. This does not happen on macOS 10.12 or older and only happens on 10.13 if Scintilla is built in Xcode 9 against the 10.13 SDK.

[Chinh Nguyen]

Evidently, you must close windows now, not just release them. Included is a patch that I believe fixes the problem. Sorry if line endings is screwed up. Xcode 9 now seems to change line endings to Unix whereas earlier versions preserved them but I believed I fixed the line endings prior to making the patch file.

[Neil Hodgson]

Reproduced the problem with SciTE.

Committed fix as [ab409d].