Add emoji support to the yaml text editor

[Anders Björklund]

Some of the example files are using emojis, like "green circle":

# CPUs: if you see performance issues, try limiting cpus to 1.
# 🟢 Builtin default: 4
cpus: null

# Memory size
# 🟢 Builtin default: "4GiB"
memory: null

# Disk size
# 🟢 Builtin default: "100GiB"
disk: null

But these codepoints are not currently supported by the text editor:

---

See e.g. https://unicode.org/emoji/charts/full-emoji-list.html#1f7e2

There is support for this in https://github.com/raven-worx/qrwemoticons

• https://www.openmoji.org/ (CC BY-SA 4.0)

• https://www.openmoji.org/library/emoji-1F7E2/

[Anders Björklund]

Fixed, 285c588