Issue #1800784 by Amitaibu: Fixed Better override 'empty' text for theme_taxonomy_overview_vocabularies().

Issue #1737104 by Amitaibu: Remove integration with og_context() as it passes also context for non-admin pages.

Issue #1737104 by Amitaibu | rbrandon: Form/Query Alter rely on specific path structure, falling back to og-context().

This reverts commit 88614abe.