Fixed window offset (#123)

* Fixed window offset

* Fixed stylelint issue

CHANGELOG.md

@@ -35,6 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Dataset import in an organization (<https://github.com/cvat-ai/cvat/pull/18>, <https://github.com/cvat-ai/cvat/pull/35>)
 - Updated minimist npm package to v1.2.6 (<https://github.com/cvat-ai/cvat/pull/34>)
 - Request Status Code 500 "StopIteration" when exporting dataset (<https://github.com/cvat-ai/cvat/pull/17>)
+- Annotation window might have top offset if try to move a locked object (<https://github.com/cvat-ai/cvat/pull/123>)
 
 ### Security
 - TDB

cvat-ui/src/components/annotation-page/styles.scss

@@ -11,6 +11,7 @@
 
 .cvat-annotation-layout-content {
     height: 100%;
+    overflow-y: clip;
 }
 
 .ant-layout-header.cvat-annotation-header {