This is not feasible out of the box.

I'm not sure this is something we would want implemented in Core, at least not in the way you propose in your mock-up - IMO, having this big green progress bar in the title looks ugly.

The desired result could be achieved by a lighter UI, with a fairly simple change in roadmap_page.php, e.g. something like

diff --git a/roadmap_page.php b/roadmap_page.php
index a8e86c789..ef3746ed6 100644
--- a/roadmap_page.php
+++ b/roadmap_page.php
@@ -72,7 +72,7 @@ require_api( 'version_api.php' );
  * @param array $p_version_row Array containing project version data.
  * @return void
  */
-function print_version_header( array $p_version_row ) {
+function print_version_header( array $p_version_row, $p_progress = 0 ) {
    $t_project_id   = $p_version_row['project_id'];
    $t_version_id   = $p_version_row['id'];
    $t_version_name = $p_version_row['version'];
@@ -104,6 +104,9 @@ function print_version_header( array $p_version_row ) {
    print_icon( $t_block_icon, '1 ace-icon bigger-125' );
    echo '</a>';
    echo '</div>';
+   if( $p_progress ) {
+       echo '<div class="widget-toolbar">' . $p_progress . '%</div>';
+   }
    echo '</div>';

    echo '<div class="widget-body">';
@@ -341,7 +344,7 @@ foreach( $t_project_ids as $t_project_id ) {
            }

            if( !$t_version_header_printed ) {
-               print_version_header( $t_version_row );
+               print_version_header( $t_version_row, $t_progress );
                $t_version_header_printed = true;
            }

Please note that modifying MantisBT source code is not supported, so do it at your own risk.

image.png (11,765 bytes)   

image.png (11,765 bytes)   

Great, that's enough for me, thank you very much.

PR https://github.com/mantisbt/mantisbt/pull/1748