[BUG] Error when clicking on a Venn diagram near the edge of a circle

[acardona]

Add two circles to the Venn Diagram: one that fully encloses the other.
Then click near where the two circles touch, near the outside.
Then see:

An error occured in CATMAID and the current action can't be completed. You can try to reload the widget or tool you just used.

Click to show/hide detail (please include in bug reports)

Version: 2021.12.21-dev-unknown
Error: Uncaught TypeError: Cannot read properties of undefined (reading 'models') URL: https://neurophyla.mrc-lmb.cam.ac.uk/catmaid/drosophila/l1/seymour/static/js/catmaid.1fd00eb70db2.js Line: 118968 Column: 44 User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36 Stacktrace: TypeError: Cannot read properties of undefined (reading 'models')
    at SVGCircleElement.click (https://neurophyla.mrc-lmb.cam.ac.uk/catmaid/drosophila/l1/seymour/static/js/catmaid.1fd00eb70db2.js:118968:44)
    at SVGCircleElement.__onclick (https://neurophyla.mrc-lmb.cam.ac.uk/catmaid/drosophila/l1/seymour/static/js/libs/d3-lib.b462cb9f8fa7.js:1052:18)