update the powertoys tray graphic to a a single color

[Pomax]

Summary of the new feature/enhancement

Please change the powertoys icon to something that uses a single color. Most applications follow this rule which makes is easy to organize their icons in the tray in a way that lets you quickly find the icon, but a multicolor icon like the current one doesn't fit anywhere. Alternatively, just make it a white outline icon without any color, like most other win10 icons, so it can be grouped with those.

Small thing, surprisingly important to get right.

[niels9001]

Duplicate of #3523

[Jay-o-Way]

I wouldn't use the word "important", feels like a personal preference to me.

[Pomax]

accessibility is never personal preference.