[BUG] Replace the Icons for Settings and such with the one from snappercord's repo.

[NotDarkn]

Describe the bug
Basically when using the default settings icons from downloading Zelk, the majority of icons are bugged, like some of them showing the default powercord logo for Spotify, Theme Toggler, etc.

Because of this, the icons should just be switched to the one from the snappercord repo. Plus it's a very simple fix to implement, just go to zelk.css, and replace the settings icon link with the one from snappercord's repo.

To Reproduce
Steps to reproduce the behavior:

1. Download Powercord and install it.
2. Install Theme Toggler.
3. Install Zelk.
4. Look at the Settings Icons.

Screenshots
https://imgur.com/8y4wuqL

Setup

• OS: [e.g. Windows]
• Client Mod: [e.g. BetterDiscord]
• Release Channel: [e.g. canary, stable]
• Enabled Themes: Zelk - Amazing Activity Cards - Better Badges - Discolored
• Enabled Plugins: Default Powercord Plugins - BetterDiscord Plugins | These plugins do not affect the UI.

[schnensch0]

thought it was abandoned, but after the recent commits i'll revert it back to before 82d4e3a

[schnensch0]

done