allow projector creation only in object mode

projector.py

@@ -522,11 +522,15 @@ def init_projector(proj_settings, context):
 
 
 class PROJECTOR_OT_create_projector(Operator):
-    """ Create Projector """
+    """Create Projector"""
     bl_idname = 'projector.create'
     bl_label = 'Create a new Projector'
     bl_options = {'REGISTER', 'UNDO'}
 
+    @classmethod
+    def poll(cls, context):
+        return context.mode == 'OBJECT'
+
     def execute(self, context):
         projector = create_projector(context)
         init_projector(projector.proj_settings, context)
@@ -560,6 +564,7 @@ def update_projected_texture(proj_settings, context):
 
 
 class PROJECTOR_OT_delete_projector(Operator):
+    """Delete Projector"""
     bl_idname = 'projector.delete'
     bl_label = 'Delete Projector'
     bl_options = {'REGISTER', 'UNDO'}