[TD] Make DrawViewSpreadSheet respect DrawPage::redrawCommand() update mechanism.

src/Mod/TechDraw/App/DrawPage.cpp

@@ -372,6 +372,15 @@ void DrawPage::updateAllViews()
             line->recomputeFeature();
         }
     }
+
+    //fourth, try to execute all spreadsheets.
+    for (it = featViews.begin(); it != featViews.end(); ++it) {
+        TechDraw::DrawViewSpreadsheet *sheet = dynamic_cast<TechDraw::DrawViewSpreadsheet *>(*it);
+        if (sheet != nullptr) {
+            sheet->recomputeFeature();
+        }
+    }
+
 }
 
 std::vector<App::DocumentObject*> DrawPage::getAllViews(void) 

src/Mod/TechDraw/App/DrawPage.h

@@ -31,6 +31,7 @@
 #include <App/PropertyStandard.h>
 #include <App/PropertyFile.h>
 #include <Mod/TechDraw/App/DrawViewPart.h>
+#include <Mod/TechDraw/App/DrawViewSpreadsheet.h>
 
 namespace TechDraw
 {