- [GUI] logged RPC request error instead of opening a dialog message when in debug mode;
- [GUI] added a draft of callback for opening a gemini address.
- [RPC] learnt that (error "string" arg1 arg2 ... argn), is similar to
(error (format nil "string" arg1 arg2 ... argn)) so (error (format
nil "~a" "~c")) is equal to (error "~c"); => format error (missing
argument for format string)!