Check file visibility conflicts check

1.7.2

- added: `Object visibility conflict` in file check
  - print in console when object have render activated but not viewport (& vice-versa)
  - Standalone ops "List Object Visibility Conflicts" (`gp.list_object_visibility`)
- added: `GP Modifier visibility conflict` in file check.
  - print in console when gp modifiers have render activated but not viewport (& vice-versa)
  - Standalone ops "List GP Modifiers Visibility Conflicts" (`gp.list_modifier_visibility`)
- code: show_message_box utils can now receive operator in sublist (if 3 element)

__init__.py

@@ -15,7 +15,7 @@ bl_info = {
 "name": "GP toolbox",
 "description": "Set of tools for Grease Pencil in animation production",
 "author": "Samuel Bernou, Christophe Seux",
-"version": (1, 7, 1),
+"version": (1, 7, 2),
 "blender": (2, 91, 0),
 "location": "Sidebar (N menu) > Gpencil > Toolbox / Gpencil properties",
 "warning": "",
@@ -465,6 +465,8 @@ class GPTB_prefs(bpy.types.AddonPreferences):
             col.prop(self.fixprops, 'set_pivot_median_point')
             col.prop(self.fixprops, 'disable_guide')
             col.prop(self.fixprops, 'list_disabled_anim')
+            col.prop(self.fixprops, 'list_obj_vis_conflict')
+            col.prop(self.fixprops, 'list_gp_mod_vis_conflict')
             col.prop(self.fixprops, 'autokey_add_n_replace')
             #-# col.prop(self.fixprops, 'set_cursor_type')
             col.prop(self.fixprops, "select_active_tool", icon='RESTRICT_SELECT_OFF')