Content Reminder Time Selection Format Consistency

Problem/Motivation

When adding a time for a notification to be sent out, no timezone is mentioned and the display of time is inconsistent.

Steps to reproduce

- Add a content notification to a piece of content and enter 5:00:00 PM as the time of the notification (for a future date). Note that there is no indication of a time zone. I am in Mountain Time (during Daylight savings), so I am entering 5:00:00 PM expecting Mountain Time.

- Go to the content notification view and look at the row for the new content notification. (admin/structure/content_reminder). Note that the format of the time is different than how the time was entered when creating the notification. Also note that the format is in GMT and appears to be created expecting that the time is in the eastern time zone (during daylight savings). 5PM mountain time (during daylight savings) should be represented as 23:00:00 GMT. Instead, 21:00:00 GMT indicates that 5PM Eastern time (during daylight savings) was entered.

Proposed resolution

Uncertain, but one option would be to do the following:
- provide a configuration for the time zone to be used when creating a notification.
- display the expected timezone on the notification form (i.e. 'all times should be Eastern')
- on the overview page, modify time format to be consistent with the time entered in the notification.
- always default to Eastern maybe?