Add support for reflection and output tags

[pwkip]

This code should work:

Your country
    [checkbox* your-country use_label_element "China" "India" "San Marino"]

[reflection your-country "(nothing selected)"]

<label> Choose number
    [range* your-range min:10 max:99] </label>

You chose [output your-range "0"]

Source: https://contactform7.com/reflection/

But it doesn't: https://conditional-fields-cf7.bdwm.be/form-tester/?test-form=Reflection

[pwkip]

Also see:

• https://wordpress.org/support/topic/cf7-reflect-field-stops-working/
• https://wordpress.org/support/topic/problem-with-reflection-and-output/