When setting scale range, make sure to set min before max scale

This ensures the limit on max scale imposed by previously set min
scale does not trim the new value.

Fixes #15463

(cherry picked from commit 55ffbf5)

src/gui/qgsscalerangewidget.cpp

@@ -128,8 +128,8 @@ double QgsScaleRangeWidget::maximumScaleDenom()
 
 void QgsScaleRangeWidget::setScaleRange( double min, double max )
 {
-  setMaximumScale( max );
   setMinimumScale( min );
+  setMaximumScale( max );
 }
 
 void QgsScaleRangeWidget::emitRangeChanged()