[CertMgr] Use Text instead of WindowText color group.
[CertMgr] Added columns sorting, closes #1809.
[Poshuku FUA] Removed obsolete unused functions.
[Poshuku FUA] Code style fixes.
[Poshuku] Moved default UA string creation to IProxyObject.

For #1814.
[Poshuku FUA] Keep presets as a list of pairs & build backlook map.

For #1814.
[Poshuku FUA] Reverted full agents list for #1814.
[Poshuku FUA] Moved user agent buildup into initPlugin() for #1814.
[Poshuku FUA] Add own UA, closes #1814.
[Poshuku FUA] Code style fix.
[Poshuku FUA] Fixed user-visible agent strings.