Allow for status action customization

[deanveloper]

Pitch

Add a way to customize which actions appear outside of the ellipsis menu for statuses. Should be similar to the UI Customization for which icons appear at the top-right of statuses, ie a list of checkboxes which determine the actions that appear for a status.

Optionally, it would be nice if we could add a way to combine the favorite and react buttons into a single button. Right-clicking or holding down on the favorite button would then allow for reacting.

Motivation

The timeline UI can get very crowded, especially on mobile after the addition of reactions. This is on a large phone screen too, I imagine this looks even more crowded on smaller phone screens

[ghost]

@deanveloper, based on my knowledge of RWD, the front-end React app would need to access the user's view port dimensions (most likely via the window global or a third-party library). Smaller view port widths would trigger the desired behaviors.