News in activity log - feature (#700)

* User interface of news tab feature (#694)

* Create mock of data

* Add icon assets

* Update translations

* Update variables

* Add item counter for tabs

* Update ActivityStreamWithTabs with NewsFeed component

* Create NewsFeed component

* Update mock file with html content

* Add Collapse functionality to news item

* Add notification logic for news tab (#593)

* Update mui imports compatible with new mui version

* Fix duplicated component and error with undefined

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Co-authored-by: mikozet <mikozet2@gmail.com>
Co-authored-by: mikozet <95082155+mikozet@users.noreply.github.com>

* 519 connect news feature to api 3 (#729)

* Seperate ActivityStreamItem component in seperate file

* Add ActivityStreamItemAvatar component

* Add images assets and update icon asset

* Add news module

* Update Activity related components

* Create wysiwyg styles, update icons

* Update TabNavigationAction component

* Update actions and reducers

* Update ActivityItem shadow

* Update padding of Container and footer and ActivityList container

* Correct loading behaviour while pressing load more button

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Co-authored-by: mikozet <mikozet2@gmail.com>
Co-authored-by: mikozet <95082155+mikozet@users.noreply.github.com>