PartDesign: FeatureExtrude: Taper should not be read-only when throughall.

src/Mod/PartDesign/App/FeatureExtrude.cpp

@@ -224,7 +224,7 @@ void FeatureExtrude::updateProperties()
             localOffset = true;
         }
         else if (method == "ThroughAll") {
-            // No specific length/taper/offset for ThroughAll type
+            taperVisible = true;
         }
     };