4062: fix greedy infinite scrolling in tabs displaying more than one kind (Jobs and pipelines tab and Other objects tab).
Not only did scrolling never stopped, it never reloaded the next page and reloaded the same first page again and again.
Added test fixtures with many objects to test scrolling.
Added tests to use vertical scrollbar. The test itself is not able to test infinite scrolling by reloading the next page.
This may be because in integration testing new content is displayed only due to a click action.
4062: trailing white space
Merge branch 'master' into 4062-infinite-scroll-repeat-issue
4062: test update
Merge branch 'master' into 4062-infinite-scroll-repeat-issue
4062: update python testing to handle the multiple fixture object creation, similar to workbench test_helper update.
4062: test updates
4062: Do not include offset in the next_page_href when objects of multiple kinds are being fetched; instead, we will rely on created_at filter alone.
Updated the tests and fixtures to expect all 200+ objects in the pipelines and jobs tab.
The test however is still not working as the created_at filter based fetch is not working.
Merge branch 'master' into 4062-infinite-scroll-repeat-issue

Conflicts:
	services/api/test/fixtures/collections.yml
	services/api/test/fixtures/jobs.yml
4062: Merge branch 'master' into 4062-infinite-scroll-repeat-TC
4062: Do not clobber next_page_url filters with local filters.
closes #4062
Merge branch '4062-infinite-scroll-repeat-TC'