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.
Fix tests.
Wait before getting plugins.
Added DJANGO_LIVE_TEST_SERVER_ADDRESS as a fix for Address already in use.
Minimized code.
Merge pull request #2642 from patrick91/fix_copy_plugins

Fix copy plugins