[TD] add dialog for hatches

as discussed in the forum, the hatch feature misses a dialog. So here it is. The code is more or less just the one of the existing GeomHatch dialog

src/Mod/TechDraw/Gui/ViewProviderHatch.cpp

@@ -37,9 +37,12 @@
 #include <App/Document.h>
 #include <App/DocumentObject.h>
 #include <Gui/Application.h>
+#include <Gui/Control.h>
 
 #include <Mod/TechDraw/App/DrawHatch.h>
 #include <Mod/TechDraw/App/DrawViewPart.h>
+
+#include "TaskHatch.h"
 #include "ViewProviderHatch.h"
 
 using namespace TechDrawGui;
@@ -93,6 +96,45 @@ std::vector<std::string> ViewProviderHatch::getDisplayModes(void) const
     return StrList;
 }
 
+bool ViewProviderHatch::setEdit(int ModNum)
+{
+    Q_UNUSED(ModNum);
+    Gui::TaskView::TaskDialog *dlg = Gui::Control().activeDialog();
+    TaskDlgHatch *projDlg = qobject_cast<TaskDlgHatch *>(dlg);
+    if (projDlg && (projDlg->getViewProvider() != this))
+        projDlg = 0; // somebody left task panel open
+
+    // clear the selection (convenience)
+    Gui::Selection().clearSelection();
+
+    // start the edit dialog
+    if (projDlg) {
+        projDlg->setCreateMode(false);
+        Gui::Control().showDialog(projDlg);
+    }
+    else {
+        Gui::Control().showDialog(new TaskDlgHatch(getViewObject(), this, false));
+    }
+
+    return true;
+}
+
+void ViewProviderHatch::unsetEdit(int ModNum)
+{
+    if (ModNum == ViewProvider::Default) {
+        Gui::Control().closeDialog();
+    }
+    else {
+        ViewProviderDocumentObject::unsetEdit(ModNum);
+    }
+}
+
+bool ViewProviderHatch::doubleClicked(void)
+{
+    setEdit(0);
+    return true;
+}
+
 void ViewProviderHatch::onChanged(const App::Property* prop)
 {
     if ((prop == &HatchScale) ||