Facet filters: Don't remove spaces from value

[felipeelia]

Description of the Change

As we don't remove spaces from the term name while generating the data-term-name attribute (see here), there is no point in removing it from the user inputted value.

Verification Process

1. Create a category called "New York" and assign a post to it
2. Create a facets widget with more than 15 terms, so filtering is enabled
3. Type "New Y"
4. See the term there

Applicable Issues

Closes #2217

Changelog Entry

• Fix an error in facets filters where terms wouldn't match if the user types a space

[oscarssanchez]

LGTM!