Fixes #23015

The standard in FreeCAD is that workbench preference pages get loaded when the module gets loaded.
That behavior was altered by PR 21981 which attempted to load CAM preference pages at startup even if CAM was not loaded.
The result was that pages were only partially loaded and the result was a confusing mess.

There is some discussion about future enhancements to allow workbench preferences to be loaded early.
When that is implemented, CAM will adjust to be compliant with FreeCAD standard.

This effectively revertts PR #21981

src/Mod/CAM/InitGui.py

@@ -22,39 +22,11 @@
 # *                                                                         *
 # ***************************************************************************
 import FreeCAD
-from PySide.QtCore import QT_TRANSLATE_NOOP
-import Path.Dressup.Gui.Preferences as PathPreferencesPathDressup
-import Path.Tool.assets.ui.preferences as AssetPreferences
-import Path.Main.Gui.PreferencesJob as PathPreferencesPathJob
-import Path.Base.Gui.PreferencesAdvanced as PathPreferencesAdvanced
-import Path.Op.Base
-import Path.Tool
 
 
 FreeCAD.__unit_test__ += ["TestCAMGui"]
 
 
-if FreeCAD.GuiUp:
-    import FreeCADGui
-
-    FreeCADGui.addPreferencePage(
-        PathPreferencesPathJob.JobPreferencesPage,
-        QT_TRANSLATE_NOOP("QObject", "CAM"),
-    )
-    FreeCADGui.addPreferencePage(
-        AssetPreferences.AssetPreferencesPage,
-        QT_TRANSLATE_NOOP("QObject", "CAM"),
-    )
-    FreeCADGui.addPreferencePage(
-        PathPreferencesPathDressup.DressupPreferencesPage,
-        QT_TRANSLATE_NOOP("QObject", "CAM"),
-    )
-    FreeCADGui.addPreferencePage(
-        PathPreferencesAdvanced.AdvancedPreferencesPage,
-        QT_TRANSLATE_NOOP("QObject", "CAM"),
-    )
-
-
 class PathCommandGroup:
     def __init__(self, cmdlist, menu, tooltip=None):
         self.cmdlist = cmdlist
@@ -94,10 +66,13 @@ class CAMWorkbench(Workbench):
         import Path.Tool.assets.ui.preferences as AssetPreferences
         import Path.Main.Gui.PreferencesJob as PathPreferencesPathJob
 
+        translate = FreeCAD.Qt.translate
+
         # load the builtin modules
         import Path
         import PathScripts
         import PathGui
+        from PySide import QtCore, QtGui
 
         FreeCADGui.addLanguagePath(":/translations")
         FreeCADGui.addIconPath(":/icons")
@@ -108,16 +83,25 @@ class CAMWorkbench(Workbench):
         from Path.Tool.toolbit.ui import cmd as PathToolBitCmd
         from Path.Tool.library.ui import cmd as PathToolBitLibraryCmd
 
-        from Path.Tool.camassets import cam_assets
-
-        cam_assets.setup()
-
         from PySide.QtCore import QT_TRANSLATE_NOOP
 
         import PathCommands
         import subprocess
         from packaging.version import Version, parse
 
+        FreeCADGui.addPreferencePage(
+            PathPreferencesPathJob.JobPreferencesPage,
+            QT_TRANSLATE_NOOP("QObject", "CAM"),
+        )
+        FreeCADGui.addPreferencePage(
+            AssetPreferences.AssetPreferencesPage,
+            QT_TRANSLATE_NOOP("QObject", "CAM"),
+        )
+        FreeCADGui.addPreferencePage(
+            PathPreferencesPathDressup.DressupPreferencesPage,
+            QT_TRANSLATE_NOOP("QObject", "CAM"),
+        )
+
         Path.GuiInit.Startup()
 
         # build commands list
@@ -194,6 +178,7 @@ class CAMWorkbench(Workbench):
             prepcmdlist.append("CAM_PathShapeTC")
             extracmdlist.extend(["CAM_Area", "CAM_Area_Workplane"])
             specialcmdlist.append("CAM_ThreadMilling")
+            twodopcmdlist.append("CAM_Slot")
 
         if Path.Preferences.advancedOCLFeaturesEnabled():
             try:
@@ -307,6 +292,14 @@ class CAMWorkbench(Workbench):
         if curveAccuracy:
             Path.Area.setDefaultParams(Accuracy=curveAccuracy)
 
+        # keep this one the last entry in the preferences
+        import Path.Base.Gui.PreferencesAdvanced as PathPreferencesAdvanced
+        from Path.Preferences import preferences
+
+        FreeCADGui.addPreferencePage(
+            PathPreferencesAdvanced.AdvancedPreferencesPage,
+            QT_TRANSLATE_NOOP("QObject", "CAM"),
+        )
         Log("Loading CAM workbench... done\n")
 
     def GetClassName(self):
@@ -322,6 +315,8 @@ class CAMWorkbench(Workbench):
         pass
 
     def ContextMenu(self, recipient):
+        import PathScripts
+
         menuAppended = False
         if len(FreeCADGui.Selection.getSelection()) == 1:
             obj = FreeCADGui.Selection.getSelection()[0]
@@ -344,7 +339,6 @@ class CAMWorkbench(Workbench):
                     "Profile" in selectedName
                     or "Contour" in selectedName
                     or "Dressup" in selectedName
-                    or "Pocket" in selectedName
                 ):
                     self.appendContextMenu("", "Separator")
                     # self.appendContextMenu("", ["Set_StartPoint"])