Add operators and tests [ci skip]
Fix typo errors [ci skip]
Add a test for add page method fail [ci skip]
Fix a minor typo
Add pages link methods to operator class
Add insert/remove page link location methods
Throw an error when deleting a page fails
Remove empty lines [ci skip]
Add icon finder for custom icon support
Comment typo fixes [ci skip]
Use ContainerInterface
Add a template finder method
Merge branch 'master' into develop-operator

Conflicts:
	config/services.yml
Rename a function
Move semicolons to newlines after chained calls
Combine page links tests into 1 file
Replace previous test files
Further specify order of page links by page id, then page link id
Fix invalid data for postgres test
Add missing @throws to docblocks