Bokeh 3.7 compatibility

[fjetter]

radius is required now. In my testing, I couldn't provoke a meaningful difference varying that number so I just hard coded it to one. The circle that's being shown here are the measurements on the activity timeline, i.e. we also could do without

[github-actions]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    27 files  ±0      27 suites  ±0   11h 42m 44s ⏱️ + 11m 40s
 4 102 tests ±0   3 989 ✅ + 6    111 💤 ±0  2 ❌  -  5 
51 430 runs   - 1  49 131 ✅ +33  2 297 💤 +1  2 ❌  - 34 

For more details on these failures, see this check.

Results for commit e7d0a8f. ± Comparison against base commit a96599e.