No break space const

cvat-ui/src/components/annotation-page/attribute-annotation-workspace/attribute-annotation-sidebar/attribute-editor.tsx

@@ -56,7 +56,8 @@ function renderInputElement(parameters: InputElementParameters): JSX.Element {
                 >
                     {values.map((value: string): JSX.Element => (
                         <Select.Option key={value} value={value}>
-                            {value === consts.UNDEFINED_ATTRIBUTE_VALUE ? '\u00a0' : value}
+                            {value === consts.UNDEFINED_ATTRIBUTE_VALUE
+                                ? consts.NO_BREAK_SPACE : value}
                         </Select.Option>
                     ))}
                 </Select>
@@ -76,7 +77,8 @@ function renderInputElement(parameters: InputElementParameters): JSX.Element {
                 >
                     {values.map((value: string): JSX.Element => (
                         <Radio style={{ display: 'block' }} key={value} value={value}>
-                            {value === consts.UNDEFINED_ATTRIBUTE_VALUE ? '\u00a0' : value}
+                            {value === consts.UNDEFINED_ATTRIBUTE_VALUE
+                                ? consts.NO_BREAK_SPACE : value}
                         </Radio>
                     ))}
                 </Radio.Group>

cvat-ui/src/components/annotation-page/standard-workspace/objects-side-bar/object-item.tsx

@@ -509,7 +509,8 @@ function ItemAttributeComponent(props: ItemAttributeComponentProps): JSX.Element
                     >
                         { attrValues.map((value: string): JSX.Element => (
                             <Radio key={value} value={value}>
-                                {value === consts.UNDEFINED_ATTRIBUTE_VALUE ? '\u00a0' : value}
+                                {value === consts.UNDEFINED_ATTRIBUTE_VALUE
+                                    ? consts.NO_BREAK_SPACE : value}
                             </Radio>
                         )) }
                     </Radio.Group>
@@ -537,7 +538,8 @@ function ItemAttributeComponent(props: ItemAttributeComponentProps): JSX.Element
                     >
                         { attrValues.map((value: string): JSX.Element => (
                             <Select.Option key={value} value={value}>
-                                {value === consts.UNDEFINED_ATTRIBUTE_VALUE ? '\u00a0' : value}
+                                {value === consts.UNDEFINED_ATTRIBUTE_VALUE
+                                    ? consts.NO_BREAK_SPACE : value}
                             </Select.Option>
                         )) }
                     </Select>

cvat-ui/src/consts.ts

@@ -3,7 +3,9 @@
 // SPDX-License-Identifier: MIT
 
 const UNDEFINED_ATTRIBUTE_VALUE = '__undefined__';
+const NO_BREAK_SPACE = '\u00a0';
 
 export default {
     UNDEFINED_ATTRIBUTE_VALUE,
+    NO_BREAK_SPACE,
 };