GitLab

* Make sidebar float over EV content view when open

* separate sidebar floating class in standard app layout

* update tests for standard app layout

* PR suggestions

* fix test case in standard app layout

* add slideover sidebar to storybook

* remove default values for default props in layout stories

* improve how props are passed to StandardAppLayout in layout stories

* move track panel bar icons to sidebar folder

* replace TrackPanelBarIcon with ImageButton in TrackPanelBar

* add styling to sidebar icons and fix sidebar class names

* Add sidebar toolstrip to entity viewer

* change the following to lower case: toolStrip, sideBar, topBar

* use lowercase for topBar in all other places in the site

* fix storybook issues

* fix wrong sidebar class names

* get rid of sidebar configs

* Replace shortened EV with EntityViewer

* PR suggestions

Also:
- Split entity viewer redux state into smaller parts, one of which is sidebar
- Added the sidebar part of entity viewer redux state,
   modelled as an object keyed by genome id.
- Added a pair of statuses (OPEN, CLOSED) to the Status enum
   and used it to denote whether sidebar is open or closed.

Also:
- Use a dedicated component for sidebar tabs rather than generating them in
   StandardAppLayout.
- update npm script for running the style linter
- update test for ZmenuContent component (use mock redux store rather than real one)
- make browser bar content (gene info) responsive to the width of its container
   (via ResizeObserver)
- make opening and closing of the sidebar to be instantaneous rather than animated
  (better for performance)
- remove viewport metatag in the hope that the site will display in its desktop version 
   on mobile devices

Add a common grid-like layout to be shared by different applications (e.g. Genome browser
and Entity viewer)