As an editor I want to search namespaces using lowercase prefixes in order to find a Lexeme, Property or EntitySchema easily.

Problem:
Scoped typeahead search switches namespaces using the exiting pattern of adding a prefix to the search bar e.g. E: P: L:, but does not accept the same prefixes as lowercases.

The solution should also switch namespaces with their lowercase equivalent i.e. (e: for EntitySchemas, p: for Properties, l: for Lexemes, i: for Items), as this is a pattern that exists in the current search.

Acceptance criteria:

• Scoped Typeahead Search switches namespaces when using the prefix search (e: for EntitySchemas, p: for Properties, l: for Lexemes, i: for Items)
• The namespace selection can be overriden by selecting another namespace using the dropdown