Fix figure positioning to use correct handle

Replaces 'gcf' with 'h' in the set function to ensure the correct figure handle is used when setting position and units. This prevents potential issues when multiple figures are open or when 'h' is not the current figure.

Author: markmikkelsen

SavePDF.m

@@ -59,7 +59,7 @@
     end
     fig_w = 11*px_sz;
     fig_h = 8.5*px_sz;
-    set(gcf, 'Units', 'Pixels', 'Position', [(scr_sz(3)-fig_w)/2, (scr_sz(4)-fig_h)/2, fig_w, fig_h]);
+    set(h, 'Units', 'Pixels', 'Position', [(scr_sz(3)-fig_w)/2, (scr_sz(4)-fig_h)/2, fig_w, fig_h]);
 
     % Create output folder
     if ~MRS_struct.p.bids