[sources management] nicer source management view and breadcrumbs (closes #1946329) * nice 'add host config button' * table displaying host configuration * display a source's config using <pre> or something like that that respects EOL * configure breadcrumbs for CWSourceSchemaConfig and CWSourceHostConfig

\.svn
^build$
^dist$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*