Fix copy plugins from language from the placeholder menu.
Added some padding to the body to make the placeholder menu visible so that the test works.
Added 2 frontend tests for checking if the clipboard copy and the copy from language item work.
fixes #1234
fixes #1738
fixes a bug if only advanced settings are set on a title.
Merge branch 'fix-2019' into fix-1234
fix test
Fix tests.
Wait before getting plugins.
Added DJANGO_LIVE_TEST_SERVER_ADDRESS as a fix for Address already in use.
Minimized code.
If settings.USE_I18N is False, do not create a 'Language' menu in the toolbar

Signed-off-by: Martin Koistinen <mkoistinen@gmail.com>
Merge pull request #2651 from mkoistinen/language_menu

If USE_I18N is False, do not create a 'Language' menu in the toolbar
Merge pull request #2647 from digi604/fix-2624

fixes #2624 (circular imports on wsgi)
Merge pull request #2642 from patrick91/fix_copy_plugins

Fix copy plugins
Merge pull request #2645 from digi604/fix-1234

fixes #1234 (api reverse_id collisions)
fixes #2650
fixes #2649
Added unregister method to toolbar_pool.