QIOSTextResponder: restore reset/commit logic

After 2211092aa5, parts of the reset/commit logic
was left out by a mistake. This patch will add the
missing lines back into the text responder.

Task-number: QTBUG-102960
Pick-to: 6.3
Change-Id: Ib339eae2af69ce088e251fe8571bed97bbd64fc3
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

src/plugins/platforms/ios/qiostextresponder.h

@@ -63,6 +63,8 @@ QT_END_NAMESPACE
 
 - (instancetype)initWithInputContext:(QT_PREPEND_NAMESPACE(QIOSInputContext) *)context;
 - (BOOL)needsKeyboardReconfigure:(Qt::InputMethodQueries)updatedProperties;
+- (void)reset;
+- (void)commit;
 
 - (void)notifyInputDelegate:(Qt::InputMethodQueries)updatedProperties;
 

src/plugins/platforms/ios/qiostextresponder.mm

@@ -490,6 +490,18 @@
     return [super needsKeyboardReconfigure:updatedProperties];
 }
 
+- (void)reset
+{
+    [self setMarkedText:@"" selectedRange:NSMakeRange(0, 0)];
+    [self notifyInputDelegate:Qt::ImSurroundingText];
+}
+
+- (void)commit
+{
+    [self unmarkText];
+    [self notifyInputDelegate:Qt::ImSurroundingText];
+}
+
 // -------------------------------------------------------------------------
 
 #ifndef QT_NO_SHORTCUT