(impact: high) Cannot add icon to action button

[irahov]

Prerequisites

[Check these off before submitting an issue].

• Are you running the latest version? OR Are you submitting a bug for a prior version?
• Did you perform a basic issue search?

For more information, see the CONTRIBUTING guide.

Description

The BaseActionItem contains icon?: string; property but it is not taken into account, i.e. when a value is assigned to the property the UI does not render the corresponding icon
"@vcd/ui-components": "2.0.0",

Versions

1. Package version (run npm version)
   core (master) $ npm version
   {
   'vcd-ui-core': '9.0.0',
   npm: '6.14.4',
   ares: '1.16.0',
   brotli: '1.0.7',
   cldr: '36.0',
   http_parser: '2.9.3',
   icu: '65.1',
   llhttp: '2.0.4',
   modules: '72',
   napi: '5',
   nghttp2: '1.40.0',
   node: '12.16.3',
   openssl: '1.1.1g',
   tz: '2019c',
   unicode: '12.1',
   uv: '1.34.2',
   v8: '7.8.279.23-node.35',
   zlib: '1.2.11'
   }

2. Node Version (run node -v)
   core (master) $ node -v
   v12.16.3

3. OS Version

4. Browser Version