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_IMPORT_bmfile.py

@@ -6,19 +6,19 @@ class BBP_OT_import_bmfile(bpy.types.Operator, UTIL_file_browser.ImportBmxFile,
     bl_idname = "bbp.import_bmfile"
     bl_label = "Import BM (Ballance Map) File"
     bl_options = {'PRESET', 'UNDO'}
+    bl_translation_context = 'BBP_OT_import_bmfile'
     
     @classmethod
     def poll(cls, context):
         return PROP_preferences.get_raw_preferences().has_valid_blc_tex_folder()
     
     def execute(self, context):
-        self.report({'ERROR'}, 'This function not supported yet.')
+        self.report({'ERROR'}, 'This feature is not supported yet.')
         # self.report({'INFO'}, "BM File Importing Finished.")
         return {'FINISHED'}
     
     def draw(self, context):
         layout = self.layout
-        layout.label(text = 'Conflict Options')
         self.draw_import_params(layout.box())
 
 def register() -> None: