Turn Group#all_discussions into a query object.
Add discussions_query spec.
Fix broken DiscussionQuery logic.
Strip trailing whitespace.
Rename DiscussionsQuery method.
Move more queries into DiscussionsQuery.
Remove unnecessary controller logic.
Reduce capybara wait time.
Update rspec.
Move Group#discussions_sorted into DiscussionQuery

Method is now called:
DiscussionsQuery#without_current_motions
Fix bug.
Remove duplication in DiscussionsQuery.
Fix failing request spec.
Rename DiscussionsQuery to Query::VisibleDiscussions.
Fix failing spec.
Merge pull request #447 from enspiral/bug/subgroup-proposals

Bug/subgroup proposals