This replaces the spinner and connection icon with freer licensed ones.
I've slightly improved on #811:
- Inactive bars in the connection icon are now visible. This better matches the current icon and prevents a nondescript "dot" in the status bar for 1 connection.
- Remove commit xanatos@de6a850c84934ae5a1aff24e213c9abe7c2b9979 which was erroneously included