Don't require MirrorTool, RotateTool, ScaleTool or SimulationView

This was changed last April without consulting the rest of the team. We're reverting it because there is really no reason why these should not be disabled.

cura/CuraApplication.py

@@ -442,7 +442,6 @@ class CuraApplication(QtApplication):
 
             # Views:
             "SimpleView", #Dependency of SolidView.
-            "SimulationView",
             "SolidView", #Displays models. Cura is useless without it.
 
             # Readers & Writers:
@@ -452,11 +451,8 @@ class CuraApplication(QtApplication):
 
             # Tools:
             "CameraTool", #Needed to see the scene. Cura is useless without it.
-            "MirrorTool",
-            "RotateTool",
-            "ScaleTool",
             "SelectionTool", #Dependency of the rest of the tools.
-            "TranslateTool",
+            "TranslateTool", #You'll need this for almost every print.
         ])
         self._i18n_catalog = i18nCatalog("cura")