Add an option to hide the description in the task list

## Problem

Oftentimes, task descriptions have information formatted in non-line formats (like lists or such). Displaying the description on the task list might not be ideal in those situations. Not displaying the description might also be ideal when we consider that people might only want an overview of their task, and not details about it when they peruse their list to plan out their day.

## Proposal

A toggle can be given in the options to enable or disable showing of tasks. What can also be done instead, is show an icon if there is description or notes associated with a task as a secondary icon towards the right end. Of course, clicking a task can open up and show the description in the popup as is being shown now.

## Prior Art

On Things for macOS and iOS, the task shows a note icon to indicate there is more information.

You can find a screenshot here: