fix (preset values): no found preset should be an empty string, not -1 (#3509)

* fix: no found preset should be an empty string, not -1

* fix: check for undefined, not if false since 0 is valid for four range

Author: Arukuen

src/components/advanced-range-control/index.js

@@ -216,6 +216,8 @@ const AdvancedRangeControl = props => {
 			}
 			return _value === derivedValue && ( _unit === '' || _unit === unit )
 		} )
+		rangeValue = rangeValue === -1 ? '' : rangeValue
+
 		rangeOnChange = ( value, property = 'value' ) => {
 			if ( value === '' ) {
 				return _onChange( value )

src/components/four-range-control/index.js

@@ -381,6 +381,7 @@ const FourRangeControl = memo( props => {
 				}
 				return _value === initialValue && ( _unit === '' || _unit === unit )
 			} )
+			rangeValue = rangeValue === -1 ? '' : rangeValue
 			rangeOnChange = ( value, property = 'value' ) => {
 				if ( value === '' ) {
 					return initialOnChange( value )