Gui: add tags for TempoVis

Tags can be used to identify TV instances in the stack.  This is mostly for add-ons, for Part-o-magic in particular, who may want to insert some visibility automation in specific places in the stack.

src/Mod/Part/AttachmentEditor/TaskAttachmentEditor.py

@@ -285,7 +285,7 @@ class AttachmentEditorTaskPanel(FrozenClass):
         self.updatePreview()
         self.updateRefButtons()
 
-        self.tv = TempoVis(self.obj.Document)
+        self.tv = TempoVis(self.obj.Document, tag= "PartGui.TaskAttachmentEditor")
         if self.tv: # tv will still be None if Show module is unavailable
             self.tv.hide_all_dependent(self.obj)
             self.tv.show(self.obj)

src/Mod/Part/Gui/DlgExtrusion.cpp

@@ -186,7 +186,7 @@ void DlgExtrusion::on_btnSelectEdge_clicked()
         try{
             QString code = QString::fromLatin1(
                         "import Show\n"
-                        "tv = Show.TempoVis(App.ActiveDocument)\n"
+                        "tv = Show.TempoVis(App.ActiveDocument, tag= 'PartGui::DlgExtrusion')\n"
                         "tv.hide([%1])"
                         );
             std::vector<App::DocumentObject*>sources = getShapesToExtrude();

src/Mod/Part/Gui/TaskAttacher.cpp

@@ -953,7 +953,7 @@ void TaskAttacher::visibilityAutomation(bool opening_not_closing)
         try{
             QString code = QString::fromLatin1(
                 "import Show\n"
-                "tv = Show.TempoVis(App.ActiveDocument)\n"
+                "tv = Show.TempoVis(App.ActiveDocument, tag= 'PartGui::TaskAttacher')\n"
                 "tvObj = %1\n"
                 "dep_features = tv.get_all_dependent(%2, '%3')\n"
                 "if tvObj.isDerivedFrom('PartDesign::CoordinateSystem'):\n"

src/Mod/Sketcher/Gui/ViewProviderSketch.cpp

@@ -5668,7 +5668,7 @@ bool ViewProviderSketch::setEdit(int ModNum)
         try{
             QString cmdstr = QString::fromLatin1(
                         "ActiveSketch = App.getDocument('%1').getObject('%2')\n"
-                        "tv = Show.TempoVis(App.ActiveDocument)\n"
+                        "tv = Show.TempoVis(App.ActiveDocument, tag= ActiveSketch.ViewObject.TypeId)\n"
                         "if ActiveSketch.ViewObject.EditingWorkbench:\n"
                         "  tv.activateWorkbench(ActiveSketch.ViewObject.EditingWorkbench)\n"
                         "if ActiveSketch.ViewObject.HideDependent:\n"