qt511.qtbase: fix darwin build

Qt 5.11.1 replaced one occurrence of NSMouseMoved with NSEventTypeMouseMoved:
https://github.com/qt/qtbase/commit/da32360ffc3c7b677355c37ae54c89637c18047f.

It is not available in AppKit from macOS 10.10, therefore this change restores
NSMouseMoved: https://developer.apple.com/documentation/appkit/nsmousemoved

Closes #43258