feat: add translation context for operators and their properties.

- add translation context for operator, menu, panel and etc. and their associated properties.
- improve some name and description but not finished.
- move reset BME material function inside BMEMaterialsHelper.
- rename variable of collection visitor in BME adder operator for clear meaning.
- replace some message box to report in ballance elements reset operator, BME materials reset operator and rail UV operator

bbp_ng/OP_MTL_fix_material.py

@@ -5,8 +5,9 @@ from . import PROP_virtools_material, PROP_preferences
 class BBP_OT_fix_all_material(bpy.types.Operator):
     """Fix All Materials by Its Referred Ballance Texture Name."""
     bl_idname = "bbp.fix_all_material"
-    bl_label = "Fix Material"
+    bl_label = "Fix All Materials"
     bl_options = {'UNDO'}
+    bl_translation_context = 'BBP_OT_fix_all_material'
     
     @classmethod
     def poll(cls, context):