#, %, & are not treated as search chars on glossary search.

If we search for #, %, & and other special chars it's not treated as search character.
i am not sure it is valid or not. but if we dont accept those chars as search then it should give invalid message or no content message.

Steps to Reproduce:

• Login to zanata.
• Go to glossary page.
• Search for #, %, & and observe the result.

Actual Result:

• List of glossary terms show on above char search

Expected Result:

• If those are not a valid chars to search then it should show/throw specific message.