Feature request: UI design: Option for OpenTodoList b/w status icon in macOS menu bar

This may only be a cosmetic issue, but it would IMHO contribute to a more coherent, "native" look & feel on macOS: According to Apple's UI guidelines applications should use b/w icons as their macOS Finder menu bar status icons, and as far as I can see the vast majority of apps follows that specification. OpenTodoList's status icon in the macOS Finder menu bar however is a color icon:

Would it be possible to add a checkbox to OpenTodoList's settings dialogue to switch the application's status icon to b/w? Maybe also for the tray on Windows? - Thank you very much.