Slider: Fix max calculation, when step is float

Fixes #10721

new _calculateNewMax method avoid loop for better performance.

Author: dekajp

ui/slider.js

@@ -552,13 +552,13 @@ return $.widget( "ui.slider", $.ui.mouse, {
 	},
 
 	_calculateNewMax: function() {
-		var max = this._valueMin(),
-				step = this.options.step,
-				precisiondigits = this._precision();
-		while ( parseFloat( ( max + step ).toFixed( precisiondigits ) ) <= this.options.max ) {
-			max = parseFloat( ( max + step ).toFixed( precisiondigits ) );
-		}
-		this.max = max;
+		var precision = this._precision();
+		var multiplier = Math.pow( 10 , precision );
+		var max = this.options.max * multiplier ;
+		var min = this._valueMin() * multiplier ;
+		var step = this.options.step * multiplier ;
+		var remainder = ( max - min ) % step;
+		this.max = parseFloat( ( ( max - remainder ) / multiplier ).toFixed( precision ) );
 	},
 
 	_precision: function() {