Deal with issue where Designer changes include file name for promoted widget to lower case.
@@ -159,7 +159,7 @@
<customwidget>
<class>ctkDateRangeWidget</class>
<extends>QWidget</extends>
- <header>ctkdaterangewidget.h</header>
+ <header>ctkDateRangeWidget.h</header>
<container>1</container>
</customwidget>
</customwidgets>