Small refactoring of the qa_set_up_category_field function
Removed some unneeded ternary operators
Changed a few qa_db_read_all_values into qa_db_read_one_value
The search box and the search button now are properly aligned
Removed unneeded join and removed 18 unneeded fields from query
User can send an HTML notification without having to rewrite the whole logic
Switch bool castings for expressions
Merge branch 'pr/38' into dev

Closes #38