The main thrust of this PR is to take all the conditional checks based on the `enable_bookmarks_with_reminders` away and only keep the code from the `true` path, making bookmarks with reminders the core bookmarks feature. There is also a migration to create `Bookmark` records out of `PostAction` bookmarks for a site.
### Summary
* Remove logic based on whether enable_bookmarks_with_reminders is true. This site setting is now obsolete, the old bookmark functionality is being removed. Retain the setting and set the value to `true` in a migration.
* Use the code from the rake task to create a database migration that creates bookmarks from post actions.
* Change the bookmark report to read from the new table.
* Get rid of old endpoints for bookmarks
* Link to the new bookmarks list from the user summary page
New Reminder Types
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* Add a "later this week" reminder which is today + 2 days, will not show if we are on the days Thu-Sun
* Add a "start of next business week" reminder which is 8am Monday
Bugfixes and Tweaks
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* Move dates out of translation for reminder types and yield HTML for tap-tile for more customizable content and styling
* Make sure double clicking the bookmark icon in quick access takes users to the new bookmarks-with-reminders page
* Sane default to 8am (start of day) for custom reminder with no time
Martin Brennan
Robin Ward