[pre 3.10 compat] if CtxComponent as a call() method, emit a deprecation warning but use it. Also ensure default value on class for visible and order, and define wview for bw compat as well

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$