Update custom seam allowance settings if main path was changed.

--HG--
branch : feature

src/libs/vtools/dialogs/tools/dialogseamallowance.cpp

@@ -377,6 +377,7 @@ void DialogSeamAllowance::ListChanged()
         visPath->RefreshGeometry();
     }
     InitNodesList();
+    CustomSAChanged(ui->listWidgetCustomSA->currentRow());
 }
 
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