[PD Pad/Pocket] Fix bug with midplane usage in TwoLengths mode (#7216)

* [PD Pad/Pocket] Fix bug with midplane usage in TwoLengths mode

src/Mod/PartDesign/App/FeatureExtrude.cpp

@@ -144,12 +144,9 @@ void FeatureExtrude::generatePrism(TopoDS_Shape& prism,
 
 
         if (method == "TwoLengths") {
-            // midplane makes no sense here
             Ltotal += L2;
             if (reversed)
                 Loffset = -L;
-            else if (midplane)
-                Loffset = -0.5 * (L2 + L);
             else
                 Loffset = -L2;
         }

src/Mod/PartDesign/Gui/TaskPadParameters.cpp

@@ -111,9 +111,6 @@ void TaskPadParameters::onModeChanged(int index)
         break;
     case Modes::TwoDimensions:
         pcPad->Type.setValue("TwoLengths");
-        // symmetric is then not possible
-        if (ui->checkBoxMidplane->isChecked())
-            ui->checkBoxMidplane->setChecked(false);
         break;
     }
 

src/Mod/PartDesign/Gui/TaskPocketParameters.cpp

@@ -122,9 +122,6 @@ void TaskPocketParameters::onModeChanged(int index)
         case Modes::TwoDimensions:
             oldLength = pcPocket->Length.getValue();
             pcPocket->Type.setValue("TwoLengths");
-            // symmetric is then not possible
-            if (ui->checkBoxMidplane->isChecked())
-                ui->checkBoxMidplane->setChecked(false);
             break;
     }