Move search filter tooltips to the icons for better accessibility

Some screen readers were reading the search filter as "void 0" when
mouseovering it. We avoid this by moving the tooltip from the anchor
element to the icon itself.

share/html/Elements/CollectionAsTable/Header

@@ -270,9 +270,9 @@ foreach my $col ( @Format ) {
         if ( $field && $filter_comp ) {
             my $tooltip = loc( 'Filter on [_1]', loc($field) );
             my $icon = exists $filter_data{filter}{$field} ? 'funnel-fill' : 'funnel';
-            $icon = GetSVGImage(Name => $icon);
+            $icon = GetSVGImage(Name => $icon, Title => $tooltip);
             $m->out(
-                qq{&nbsp;<a href="javascript:void(0)" class="btn btn-primary button search-filter" data-bs-toggle="tooltip" data-bs-placement="bottom" data-bs-title="$tooltip">$icon</a>}
+                qq{&nbsp;<a href="javascript:void(0)" class="btn btn-primary button search-filter">$icon</a>}
             );
             $m->out( $m->scomp( $filter_comp, Attribute => $field, FilterData => \%filter_data, %ARGS ) );
         }