* Migrate homescreen specific backend code to its own class.
* Default to single column homescreen.
Create an option to handle the default homescreen layout value.
* Potentially reset sticky column when layout is changed.
* Move homescreen components to their new locations.
* Clean up defunct CSS.
* Default to the two-column layout on existing stores.
* Remove header from inbox notes.
* Add "your store today" header on two column homescreens.
* Set default homescreen layout to two columns when task list is complete or hidden.
* Remove unused variables.
* Add sticky scrolling behavior to both homepage columns.
* Remove inbox-specific class, widen single column.
* Create user preference for homescreen column layout.
* Add display options "tab" to homescreen.
* Style display options.
* Tweak homepage layout option values.
* Add tracks events for homepage layout.
* Add test coverage for homescreen display options.
* No need to use Fragment component.
* Use named exports.
* Fix display options styling on mobile/narrow viewports.
Don't show the options at all if we're forcing single column.
* Fix linting error.
Jeff Stieler