feat(Canvas): Use hover styles upon open toolbar

[lordrip]

Context

Currently, when opening the step toolbar upon hovering over a node or a group, the hover style is lost when hovering over the toolbar.

Changes

This commit retains the hover styling when the toolbar is open.

Before	After

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Please upload report for BASE (main@9ee3368). Learn more about missing BASE report.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1622 +/- ## ======================================= Coverage ? 79.73% Complexity ? 273 ======================================= Files ? 285 Lines ? 8137 Branches ? 1602 ======================================= Hits ? 6488 Misses ? 1538 Partials ? 111 ```

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[apupier]

I do not spot the difference between the before and after images oO

[lordrip]

I do not spot the difference between the before and after images oO

Notice that the before doesn't have the blue border, while the after has it.