Avoid pushing to history in WidgetFocusProvider
when new query is identical.
#21310
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Description
Motivation and Context
This PR is making sure that no new history entry is pushed by URL<->parameter synchronization when the resulting URL is identical.
This fixes an issue for the embedded search (e.g. when replaying search) when the "Show Documents" action is used.
/nocl Fixes issue with unreleased feature.
How Has This Been Tested?
Screenshots (if appropriate):
Types of changes
Checklist: