Display name, event time range, and notes in the notification

[nvllz]

Currently the notification says for the title and "The beginning of the event" for the description. It's very basic, and could be greatly improved if the app would put the time range next to the category, and put event notes instead of the generic text,

Current event notification:
Title: Shopping
Description: The beginning of the event
(dismissable)

Requested way:
Entry without notes:
Title: Shopping (12:22–14:30)
No description
(sticky, non dismissable while in progress, until marked as done using notification action button)

Event with custom notes:
Title: Shopping (12:22–14:30)
Description: <specific event notes, which could be a shopping list or something noteworthy>
(sticky, non dismissable while in progress, until marked as done using notification action button)

Notification before event start:
Title: Shopping (in 15 mins/1 hour/2 hours/tomorrow)
No description
(dismissable)

I would find this way of handling notifications much more useful than now. Additionally, making it sticky and disappear after time elapses, as requested in #118, and adding action buttons like "Add 5 mins" and "Mark as done" to dismiss would make it even more useful.