Clarify function of buttons on profile form

* "return to dashboard" throws away changes, so change the label to
  "cancel" to make this more clear.
* "Save profile" is probably the button you're looking for, so flag it
  as btn-success to make this clear.

pinaxcon/templates/registrasion/profile_form.html

@@ -34,8 +34,10 @@ THIS IS THE FORM
       {% include "_form_snippet.html" with form=form %}
       <br />
       <div class="btn-group">
-        <input class="btn" type="submit" value="Save Profile" />
-        <a class="btn btn-primary" href="{% url "dashboard" %}">Return to dashboard</a>
+          <input class="btn btn-success" type="submit" value="Save Profile" />
+          {% if user.attendee %}
+          <a class="btn btn-info" href="{% url "dashboard" %}">Cancel</a>
+          {% endif %}
       </div>
     </fieldset>
   </form>