Updated logo on main/docs sites (cvat-ai#5753)

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### Motivation and context
<!-- Why is this change required? What problem does it solve? If it
fixes an open
issue, please link to the issue here. Describe your changes in detail,
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- Changed Logo in header 
- Changed favicon

### How has this been tested?
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see how your change affects other areas of the code, etc. -->

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- [x] I submit my changes into the `develop` branch
- ~~[ ] I have added a description of my changes into the
[CHANGELOG](https://github.com/opencv/cvat/blob/develop/CHANGELOG.md)
file~~
- [x] I have updated the documentation accordingly
- ~~[ ] I have added tests to cover my changes~~
- ~~[ ] I have linked related issues (see [GitHub docs](

https://help.github.com/en/github/managing-your-work-on-github/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword))~~
- ~~[ ] I have increased versions of npm packages if it is necessary

([cvat-canvas](https://github.com/opencv/cvat/tree/develop/cvat-canvas#versioning),

[cvat-core](https://github.com/opencv/cvat/tree/develop/cvat-core#versioning),

[cvat-data](https://github.com/opencv/cvat/tree/develop/cvat-data#versioning)
and

[cvat-ui](https://github.com/opencv/cvat/tree/develop/cvat-ui#versioning))~~

### License

- [x] I submit _my code changes_ under the same [MIT License](
https://github.com/opencv/cvat/blob/develop/LICENSE) that covers the
project.
  Feel free to contact the maintainers if that's a concern.

cvat-ui/src/components/header/styles.scss

@@ -30,9 +30,7 @@
     }
 
     .anticon.cvat-logo-icon {
-        > svg {
-            transform: scale(0.7);
-        }
+        margin: 0 $grid-unit-size * 2;
     }
 
     width: 50%;

cvat-ui/src/components/signing-common/signing-layout.tsx

@@ -6,7 +6,7 @@ import './styles.scss';
 import React from 'react';
 import Layout from 'antd/lib/layout';
 import { Col, Row } from 'antd/lib/grid';
-import { CVATMinimalisticLogo } from 'icons';
+import { CVATLogo } from 'icons';
 import Icon from '@ant-design/icons';
 import Title from 'antd/lib/typography/Title';
 import SVGSigningBackground from '../../assets/signing-background.svg';
@@ -73,7 +73,7 @@ function SignInLayout(props: SignInLayoutComponentProps): JSX.Element {
             <Header className='cvat-signing-header'>
                 <Row justify='center' align='middle'>
                     <Col {...logoSizes}>
-                        <Icon className='cvat-logo-icon' component={CVATMinimalisticLogo} />
+                        <Icon className='cvat-logo-icon' component={CVATLogo} />
                     </Col>
                 </Row>
             </Header>

cvat-ui/src/components/signing-common/styles.scss

@@ -42,8 +42,8 @@ $social-google-background: #4286f5;
     padding: $grid-unit-size*2 0 0 0;
     width: 100%;
 
-    svg {
-        transform: none;
+    .cvat-logo-icon {
+        fill: white;
     }
 }
 

cvat-ui/src/icons.tsx

@@ -6,7 +6,6 @@
 import React from 'react';
 
 import SVGCVATLogo from './assets/cvat-logo.svg';
-import SVGCVATMinimalisticLogo from './assets/cvat-minimalistic-logo.svg';
 import SVGCursorIcon from './assets/cursor-icon.svg';
 import SVGMoveIcon from './assets/move-icon.svg';
 import SVGRotateIcon from './assets/rotate-icon.svg';
@@ -67,7 +66,6 @@ import SVGCheckIcon from './assets/check-icon.svg';
 import SVGUpgradeIcon from './assets/upgrade-icon.svg';
 
 export const CVATLogo = React.memo((): JSX.Element => <SVGCVATLogo />);
-export const CVATMinimalisticLogo = React.memo((): JSX.Element => <SVGCVATMinimalisticLogo />);
 export const CursorIcon = React.memo((): JSX.Element => <SVGCursorIcon />);
 export const MoveIcon = React.memo((): JSX.Element => <SVGMoveIcon />);
 export const RotateIcon = React.memo((): JSX.Element => <SVGRotateIcon />);

site/assets/scss/_custom.scss

@@ -37,6 +37,10 @@ details > .code-toolbar {
     max-width: 100%;
 }
 
+.navbar-logo {
+    fill: white;
+}
+
 /* Increased left padding on the sidebar of documentation */
 
 .td-sidebar-nav__section .ul-1 ul {