[2.4 RC1] Category selector presented without submit button

This bug lived all the way from 1.6 through 2.4.
First appearance: http://forums.b2evolution.net/viewtopic.php?t=9750
Second appearance: http://forums.b2evolution.net/...hp?t=14539

Description:
It is possible to select multiple categories for view. In the 1.x.x system it needed an extra line in the skin, in 2.4 it is a setting in the Categories widget. It generates selection boxes before the categories and radiobuttons for ANY ANY BUT and ALL selection. What is omittesd is the start of the <form> tag and the submit button plus the closing </form> tag.

Solution :
For both the 1.10 series as the 2.4 series I made a hack which consists of this code before the category list:

/blog/inc/widgets/widgets/_coll_category_list.widget.php

PHP:
        // start First part of Add Missing SubmitButton hack by Afwas
        if( $this->disp_params['use_form'] )
        { // We want to add form fields:
            $bblogUrl = $Blog->dget( 'blogurl', 'raw' );
            echo'<form action="'.$bblogUrl.'" method="get">';
        }
        // end first part of hack

and this codepiece after the category list:
PHP:
            <!-- Second part of Add Missing SubmitButton hack by Afwas -->
              <br /><br />
              <input name="submit" class="submit" value="Get selection" type="submit">
              </form>
            <!-- End hack by Afwas -->

(This is taken from the 2.4 version, In 1.10 the $param is called 'list' and the global $Blog variable must be included.)

Also reported at http://forums.b2evolution.net/viewtopic.php?t=14544