Use print_form_button() instead of print_small_button()

Avoids sending the form security token as a get parameter.

This reverts commit cf6cbd3 (i.e.
reapplies 787eaa8 including the
follow-up fix 634277d).

Fixes #372

Author: dregad

Source/pages/view.php

@@ -187,7 +187,7 @@ function( $p_bug_id ) use ( $t_view_bug_threshold ) {
 <?php
 $t_first = true;
 $t_user_id = auth_get_current_user_id();
-$t_security_token = form_security_param( 'plugin_Source_detach' );
+$t_security_token = form_security_token( 'plugin_Source_detach' );
 
 foreach ( $t_bug_rows as $t_bug_id => $t_bug_row ) {
 	$t_color_class = html_get_status_css_fg(
@@ -215,11 +215,12 @@ function( $p_bug_id ) use ( $t_view_bug_threshold ) {
 </td>
 <?php if ( $t_can_update ) { ?>
 <td class="center"><?php
-	$t_param = array( 'id' => $t_changeset->id, 'bug_id' => $t_bug_id);
-	print_small_button(
-		plugin_page( 'detach' )
-		. '&' . http_build_query( $t_param ) . $t_security_token,
-		plugin_lang_get( 'detach' )
+	print_form_button(
+		plugin_page( 'detach' ),
+		plugin_lang_get( 'detach' ),
+		array( 'id' => $t_changeset->id, 'bug_id' => $t_bug_id),
+		$t_security_token,
+		'btn btn-round btn-white btn-primary btn-sm'
 	) ?>
 </td>
 <?php } ?>