fix: get classicRepl preference
render backtrace
backtrace: filter out Error object instantiation
call sclang-interpret with getBacktrace option
if arg is function, show sourceCode
show class as Class, not Meta_Class Class
add * for class methods
tighter styling updates
on click of stack trace frame, open the source code file
render SyntaxErrors
pass selected Range to eval
repl-eval: return a promise with the error
controller-open-file: set marker, allow either charPos or line+col arguments
controller, on syntax error open file to line
gutter/line styling