Slider: trim value to min and max when page_up or page_down is pressed. Fixed #5591 - Slider: can go below its defined minimum with PageDown

Author: rdworth

ui/jquery.ui.slider.js

@@ -181,10 +181,10 @@ $.widget( "ui.slider", $.ui.mouse, {
 						newVal = self._valueMax();
 						break;
 					case $.ui.keyCode.PAGE_UP:
-						newVal = curVal + ( (self._valueMax() - self._valueMin()) / numPages );
+						newVal = self._trimAlignValue( curVal + ( (self._valueMax() - self._valueMin()) / numPages ) );
 						break;
 					case $.ui.keyCode.PAGE_DOWN:
-						newVal = curVal - ( (self._valueMax() - self._valueMin()) / numPages );
+						newVal = self._trimAlignValue( curVal - ( (self._valueMax() - self._valueMin()) / numPages ) );
 						break;
 					case $.ui.keyCode.UP:
 					case $.ui.keyCode.RIGHT: