fix(demo): release search not working

[Davidmattei]

Q	A
Bug fix?	y
New feature?	n
BC breaks?	n
Deprecations?	n
Fixed tickets?	n
Documentation?	n

The bug was '#{locale}.title.alphaorder' -> does not exits because we need to use 'title#{locale}.alpha_order' Extra fixes:

• Only show categories if in results (agg cat on release feature, added query on version)
• Do not show empty releases when selecting a category