Add a stronger test for topical event deletion.

Instead of just checking we can click the 'Delete' button and don't get
an error, we should check that the event actually gets deleted.
Merge pull request #1538 from alphagov/check-topical-events-deleted

Add a stronger test for topical event deletion
Move pending migrations into migration folder

The features these migrations relate to have now long been deployed and
verified to work. We can now safely drop the legacy data.
Merge pull request #1539 from alphagov/run-pending-migrations

Move pending migrations into migration folder
Correct migration and update schema.rb
Use ; to separate lists of elements with commas
Merge pull request #1540 from alphagov/correct-migration-and-update-schema

Correct migration and update schema.rb
Merge pull request #1541 from alphagov/comma-separated-keywords

Use ; to separate lists of elements with commas

https://www.pivotaltracker.com/story/show/69434416
Add bottom padding to stats filter form

With JS disabled, the "Help us improve" block would butt right up against
the bottom of the filter form. This fixes that.
Sub-orgs display the same as other org types
Parents of sub-orgs display in header
remove styling rules for non-existant .sub-org-name
Replace interrobang character with question mark
Merge pull request #1545 from alphagov/remove-interrobang

Replace interrobang character with question mark
Merge pull request #1543 from alphagov/add-padding-to-stats-filter-form

Add bottom padding to stats filter form
Merge pull request #1544 from alphagov/consolidate-organisation-views

Consolidate organisation views