Fixed filters with tags

cvat-core/src/annotations-filter.js

@@ -165,7 +165,9 @@ class AnnotationsFilter {
             let xbr = Number.MIN_SAFE_INTEGER;
             let ytl = Number.MAX_SAFE_INTEGER;
             let ybr = Number.MIN_SAFE_INTEGER;
+            let [width, height] = [null, null];
 
+            if (state.objectType !== 'tag') {
                 state.points.forEach((coord, idx) => {
                     if (idx % 2) { // y
                         ytl = Math.min(ytl, coord);
@@ -175,8 +177,9 @@ class AnnotationsFilter {
                         xbr = Math.max(xbr, coord);
                     }
                 });
+                [width, height] = [xbr - xtl, ybr - ytl];
+            }
 
-            const [width, height] = [xbr - xtl, ybr - ytl];
             const attributes = {};
             Object.keys(state.attributes).reduce((acc, key) => {
                 const attr = labelAttributes[key];

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

@@ -68,18 +68,22 @@ function ItemMenu(
                     Propagate
                 </Button>
             </Menu.Item>
+            { objectType !== ObjectType.TAG && (
+                <>
                     <Menu.Item>
-                <Button disabled={objectType === ObjectType.TAG} type='link' onClick={toBackground}>
+                        <Button type='link' onClick={toBackground}>
                             <Icon component={BackgroundIcon} />
                             To background
                         </Button>
                     </Menu.Item>
                     <Menu.Item>
-                <Button disabled={objectType === ObjectType.TAG} type='link' onClick={toForeground}>
+                        <Button type='link' onClick={toForeground}>
                             <Icon component={ForegroundIcon} />
                             To foreground
                         </Button>
                     </Menu.Item>
+                </>
+            )}
             <Menu.Item>
                 <Button
                     type='link'