iOS: Avoid category method name clash for UIResponder

As described in Apples documentation, own methods which are added to
existing classes should be prefixed to avoid category method name
clashes. This prefix was missing from the function
currentFirstResponder() which caused issues when closing the virtual
keyboard on some iOS devices.
(see https://developer.apple.com/library/archive/qa/qa1908/_index.html)

Pick-to: 6.7 6.6 6.5
Task-number: QTBUG-119601
Change-Id: I82fb8a8beeb0a3234594357f1e1db67b0ae3da36
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

0 files changed, 0 insertions, 0 deletions