[PD] rename icons to match Wiki files

For the What#s this feature we need to have a uniform naming of the features and its icons. For some PD icons this is not the case and since we are in feature freeze, this is the right time to address this.
(I see the same is already done for Mesh.)

src/Mod/PartDesign/Gui/TaskHelixParameters.cpp

@@ -61,7 +61,7 @@ using namespace Gui;
 /* TRANSLATOR PartDesignGui::TaskHelixParameters */
 
 TaskHelixParameters::TaskHelixParameters(PartDesignGui::ViewProviderHelix *HelixView, QWidget *parent)
-    : TaskSketchBasedParameters(HelixView, parent, "PartDesign_Additive_Helix", tr("Helix parameters")),
+    : TaskSketchBasedParameters(HelixView, parent, "PartDesign_AdditiveHelix", tr("Helix parameters")),
     ui (new Ui_TaskHelixParameters)
 {
     // we need a separate container widget to add all controls to