Fix non integer steps for slider property

src/domain_abstract/ui/InputNumber.js

@@ -132,7 +132,7 @@ export default Input.extend({
   upArrowClick() {
     const model = this.model;
     const step = model.get('step');
-    let value = parseInt(model.get('value'), 10);
+    let value = parseFloat(model.get('value'));
     value = this.normalizeValue(value + step);
     var valid = this.validateInputValue(value);
     model.set('value', valid.value);
@@ -145,7 +145,7 @@ export default Input.extend({
   downArrowClick() {
     const model = this.model;
     const step = model.get('step');
-    const value = parseInt(model.get('value'), 10);
+    const value = parseFloat(model.get('value'));
     const val = this.normalizeValue(value - step);
     var valid = this.validateInputValue(val);
     model.set('value', valid.value);