make ui configurations selectable (closes #2406609)
* introduce a new 'uicfg' registry (storing instances)
* use the relevant new APIs from lgc.registry to manage the new
registrable uicfg objects
* cw event manager useage is gone; instead thze standard registry
reloading mechanism is used
* ensure i18n commands still work (devctl)
* introduce dynamic uicfgs use whenever possible (various views), even
though sometimes the classic 'static' usage remains
\.svn
^build$
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\.pyc$
\.pyo$
\.bak$
\.old$
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\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
syntax: regexp
.*/data/database/.*\.sqlite
.*/data/database/.*\.config
.*/data/database/tmpdb.*
.*/data/ldapdb/.*
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/