Besides the extraction some minor adjustments (moving parametrized
locators like "fileActionsMenuItemFor" above the locators that use them
and placing "descendantOf" calls always in a new line) were made too.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
The app navigation is not exclusive to the Files app but a generic
component used by other apps too, so its locators and steps should be in
its own context.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>