Icons appear smaller than expected after installing Nerd Fonts
<!--- Describe issue here -->
The icons appear very small compared to when I only had Font Awsome installed, as you can see in the screenshot I provided below. The left terminal is the icon size after installing a nerd font and the right terminal is the icon size before installing a Nerd Font. Notice that the FontAwesome icons are the correct size before installing nerd fonts but after installing a nerd font the FontAwesome icons became smaller aswell. I tried many different nerd fonts and the same thing happened for all of them, however some were smaller than others. 

#### 🔧 Your Setup

- _Which font are you using (e.g. `Anonymice Powerline Nerd Font Complete.ttf`)?_
`Roboto Mono Nerd Font Complete Mono.ttf`
- _Which terminal emulator are you using (e.g. `iterm2`, `urxvt`, `gnome`, `konsole`)?_
`kitty`
- _Are you using OS X, Linux or Windows? And which specific version or distribution?_
`Arch Linux 5.15.4`

#### ★ Optional
![fonts_bug](https://user-images.githubusercontent.com/90389894/143320454-61076217-5633-46bf-b1aa-85f86fa201e7.png)