[Harald_T]

@Wez: Edit your gallery_showthread-template.

In the template find:

<if condition="$show['movethread']">
<div>
<label for="ao_feat">
<input type="radio" name="do" id="ao_feat" value="feat" />Feature
</label>
</div>
</if>

after this, insert:

<if condition="$show['movethread']">
<div>
<label for="ao_unfeat">
<input type="radio" name="do" id="ao_unfeat" value="unfeat" />Unfeature
</label>
</div>
</if>

This should do it.