Style updates

[cmunns]

We are looking great right now. Looking forward to review of this one. In addition to some edits made after the recording of video of simulator I made I've also added an intro screen pictured below.

NOTE: May need to look into transitions with the transparent background on views causing a bit of overlap in some cases.

Also closes #1

https://user-images.githubusercontent.com/1189523/210454835-3b100faf-2f91-4be9-93f5-fa12dc35a66b.mp4

[meandavejustice]

"Visit some things on the IPFS Network:"

should be on a new line.

[meandavejustice]

background gradient is rendering a bit odd on android (home and upload pages)

[meandavejustice]

Found a couple of more issues when testing on device, they non style issues but should be fixed before we merge this pr to avoid breaking changes.

1. COPY CID button after file upload messages user SUCCESS but nothing is actually added to clipboard
2. Since ipfs:// protocols do not work in chrome, the new uploaded file UI doesn't link correctly on android. If you try to click the new ipfs://{cid} link, it just does nothing.
3. shortcut links on settings page do not work

[meandavejustice]

@yocontra Ready for you if you want to take a look

[cmunns]