Center the full virtual staining map heading

app.py

@@ -442,7 +442,7 @@ def build_virtual_opencell_section():
 
         # the full map: every image and every protein named. One fixed figure (~2 MB) sent with the
         # page; the panel map above follows the selection, so this one never has to be re-sent
-        gr.HTML('<div class="vo-target"><div class="vo-section-header">Full virtual staining map</div>'
+        gr.HTML('<div class="vo-target" style="text-align: center; padding-right: 0"><div class="vo-section-header">Full virtual staining map</div>'
                 '<div class="vo-section-caption">All 93,510 generated images, each protein named at the '
                 'centre of its images; zoom in to separate the names</div></div>', padding=False)
         gr.Plot(value=full_map0, show_label=False, elem_classes="vo-umap-full")