Multi cursor visual effect

[ZacZhangzhuo]

What type of change is this?

• Multi-cursor visual effect when doing rotating or panning.

Checklist

• I added a line to the CHANGELOG.md file in the Unreleased section under the most fitting heading (e.g. Added, Changed, Removed).
• I ran all tests on my computer and it's all green (i.e. invoke test).
• I ran lint on my computer and there are no errors (i.e. invoke lint).

[ZacZhangzhuo]

#174