Edit: Things: Allow glyphs to be chosen

When adding a new thing, we can now select
a bootstrap icon to be associated with it.
Ideally, we wouldn't be using bootstrap
icons, but creating a bunch of suitable
icons and glyphs for copper heart is
beyond the scope of our journey to 1.0
Fix: Edit: saveProfile should work

We were trying to PUT to the database two times
at once, which gave us document-update conflicts,
resulting in some fields not being saved.