To view a full screen avatar for user profiles we are going to want to reuse parts of the `ImageModal` since it has all the same zooming/panning/gesture functionality we need. However, right now there are parts of `ImageModal` that are specific to viewing a multimedia message. We need to factor those parts out, so I created `FullScreenViewModal` which will be a generic component that can be used in both cases for image multimedia messages and user avatars.
Outlined below are the steps I will take in this stack (each point here will be it's own diff):
1. Introduce `FullScreenViewModal` file and move everything from the `ImageModal` file into here, and change what is absolutely necessary (the imports)
2. Correct the naming inside of `FullScreenViewModal`
3. Lift out rendering of `<Multimedia />` in favor for a generic content child
4. Lift save content / copy content functionality out of `FullScreenViewModal` and make those optional props
5. Lift the `imageDimensions` function out of `FullScreenViewModal` and introduce a required generic `contentDimesions` prop