Set TextField's readOnly prop to false in DateRangePicker - prevents keyboard popup

Author: danvick

lib/src/fields/form_builder_date_range_picker.dart

@@ -221,7 +221,7 @@ class FormBuilderDateRangePickerState
           textDirection: widget.textDirection,
           textInputAction: widget.textInputAction,
           strutStyle: widget.strutStyle,
-          readOnly: _readOnly,
+          readOnly: true,
           expands: widget.expands,
           minLines: widget.minLines,
           showCursor: widget.showCursor,

lib/src/fields/form_builder_date_time_picker.dart

@@ -292,7 +292,7 @@ class _FormBuilderDateTimePickerState extends State<FormBuilderDateTimePicker> {
       autofocus: widget.autofocus,
       decoration: widget.decoration,
       readOnly: true,
-      enabled: _readOnly ? false : widget.enabled,
+      enabled: !_readOnly,
       autocorrect: widget.autocorrect,
       controller: _textFieldController,
       focusNode: _focusNode,