update visible button

src/trimesh.fl

@@ -771,7 +771,7 @@ else mwtb->undatify(SurfEle);}
           xywh {0 0 30 20} type Toggle
         }
         MenuItem surfdisp {
-          label {Surface Elements}
+          label {Surface Faces}
           user_data surfdisp
           callback {if(((Fl_Menu_Item*)v)->checked() ) mwtb->datify(Surface);
 else mwtb->undatify(Surface);}
@@ -1194,7 +1194,7 @@ mwtb->bf_light(1);}
           }
         }
         Fl_Group surfgrp {
-          label Surface
+          label Surface open
           xywh {15 304 325 221} color 93 labelfont 1 labelsize 12 labelcolor 90 hide
         } {
           Fl_Light_Button surfvisbut {
@@ -1601,7 +1601,7 @@ mwtb->redraw();}
 mwtb->redraw(VBO_Aux);}
             xywh {25 325 35 25} value 1 labelsize 10
           }
-          Fl_Group auxDataGrp {open
+          Fl_Group auxDataGrp {
             xywh {25 309 310 75}
           } {
             Fl_Choice auxcstype {
@@ -2005,7 +2005,7 @@ mwtb->redraw();}
           }
         }
       }
-      Fl_Group colorscalegrp {open
+      Fl_Group colorscalegrp {
         xywh {10 535 330 70} box ENGRAVED_BOX when 0
         code0 {\#include "ColourGroup.h"}
         class ColourGroup
@@ -2156,7 +2156,7 @@ mwtb->redraw(VBO_Colour|VBO_Isoline_Color);}
           tooltip {sync colours} image {images/broadcast.png} xywh {255 580 45 20}
         }
       }
-      Fl_Group animate_group {open
+      Fl_Group animate_group {
         xywh {10 609 330 86} box ENGRAVED_BOX
       } {
         Fl_Box tmslider {
@@ -2308,7 +2308,7 @@ flyby = new FlyBy( mwtb, this );
 lightorient->window(mwtb);
 lightorient->Rot(Quaternion(0.,0.,1.,0.));} {}
   }
-  Function {pick_surf_color(Object_t ot, string winlab, surfColourChoice *cc=NULL)} {return_type {surfColourChoice *}
+  Function {pick_surf_color(Object_t ot, string winlab, surfColourChoice *cc=NULL)} {open return_type {surfColourChoice *}
   } {
     code {int msz = surflist->nitems();
 
@@ -2325,6 +2325,7 @@ for( int mi=0; mi<surflist->nitems(); mi++ )
        winlab += " ";
        col = mwtb->get_color(ot, mi);
        mwtb->model->get_mat( mi, matprop[0], matprop[1], matprop[2], matprop[3] );
+       surfvisbut->value(mwtb->model->surface(mi)->visible());
        break;
   }