Purpose of this commit is to give description more "business oriented"
because those descriptions appears in Odoo Studio which is supposed to be used by end users, not only by developers.
Related Task ID : 37311
* if an encoding is explicitly specified, use it and don't guess
* otherwise guess and return the guessed encoding so it can be
displayed in the configuration UI
* fix less-than-stellar configuration & behaviour of select2 inputs
to properly reflect underlying values as they get modified, to
correctly handle future configuration guesses
* Handle a leading + in import data, some contexts (e.g. bank
statements) will mark positive sums explicitly for clarity
* Add basic grouping/decimal separator inference for people importing
data from many localisations or to avoid them *having* to configure
their separators if we can handle it for them, currently very basic
Yannick Tivisse