Merge branch 'i264_multicolordot_adding_new_value' into 'develop'

fix bug not allow adding new higher condition in MultiColorDotDialog

Closes #264

See merge request !299

sohstationviewer/view/db_config/value_color_helper/edit_value_color_dialog/multi_color_dot_dialog.py

@@ -240,7 +240,7 @@ class MultiColorDotDialog(EditValueColorDialog):
                 if prev_higher_bound != -20 else '')
         cond += (f"d < {next_higher_bound}"
                  if next_higher_bound != 20 else 'd')
-        msg = f"Value entered must be: {cond}"
+        msg = f"Value d entered must be: {cond}"
         QtWidgets.QMessageBox.information(self, "Error", msg)
         try:
             self.higher_bound_lnedits[row_id].setText(
@@ -293,7 +293,7 @@ class MultiColorDotDialog(EditValueColorDialog):
         # to always satisfy validating this row's higher bound value for value
         # range is [-10,10]
         next_higher_bound = (
-            20 if row_id == len(self.row_id_value_dict) - 1
+            20 if row_id >= len(self.row_id_value_dict) - 1
             else float(self.higher_bound_lnedits[row_id + 1].text()))
 
         curr_higher_bound = float(self.higher_bound_lnedits[row_id].text())