- each class is instantionated on load
- they get all data as parameters
- better naming of fixup methods
- see issue #257

The source string is most likely to be same in all languages so it is
useful to store ignore list in cache.

Currently translated at 100.0% (798 of 798)

Increase font size in translation textarea

Fixes #272

As translate-toolkit does no parsing here (it just throws at us whole
comment lines), we need to do some processing to get nicely formatted
flags (fixes #276).

While working with them, we can also remove fuzzy flag, as it is already
represented by boolean flag within the unit (fixes #275).