* Add filtering by matching label
* Add label and contact based filters to Notification policies
* Improve filters UI, add clear filters option
* Add clearing of filters before switching to adding mode
* Move filtering code to the AmRoutesTable component
* Fix the clearing of silences filter
* Remove key-based input resetting
* Use uniqueId for input key generation
* Add tests for notification policies filtering
* Split silence matchers parameter into a separate entry for each label
* Unify the silence link creation
* Remove duplicated matchers when parsing to/from query params
* Add tests for matchers
* Add a comment with a duplication removal explanation
* Improve label duplication comment
* Remove redundant code
* Use uniqBy to simplify the code. Rename matchers parameter
* Fix Silence test data