minimal fix for the offset problem of new connection lines when editor is zoomed in/out

Author: haschek

src/extensions/react-flow/_react-flow.scss

@@ -6,6 +6,10 @@
 @import "minimap/minimap";
 @import "react-flow_v12";
 
+.react-flow__viewport {
+    transform-origin: 0 0;
+}
+
 .react-flow__background {
     border: solid 1px $eccgui-color-separation-divider;
 }