Within the renamed classes in the previous commit, there were a
few incorrect namespace, this commit fixes all them to be
correct component[\api] ones.
Also fix a few incorrect leading backslashes in namespace/use
statements. And tests extending renamed tests.
These are the only cases 100% safe to apply the renaming of the
testcase class names to match the file names.
All other cases are not safe, because they are missing namespace
and may enter into name conflicts. Adding namespaces is not as
simple as imagined because it implies to, also, add a good number
of modifications to core. See the issue for more details.
Plugins have always been able to return either a string or a lang string
when implementing the hook, 'get_shortcuts'. Since content_items will
be the replacement for that stdClass implementation, we need a way
for plugins to continue to have this flexibility. This just provides
a small contract and some classes that plugins can use in future.
Bas Brands