CharsetConverter: remove unused parameter
CharsetConverter: logicalToVisualBiDi refactoring
CharsetConverter: use FriBiDi's native UTF-32 charset to avoid double conversion
CharsetConverter: fix FriBiDi usage
CharsetConverter: cosmetics: move g_charsets[] closer to related functions
CharsetConverter: 'logicalToVisualBiDi' ability to fail on bad strings
CharsetConverter: consistency added: bidi can fail on bad sequence as well as conversion
[potential-fix] I ran into a few hangs-on-exit that this MAY help address. This allows the thread that's waiting for python threads to exit to raise python system exceptions within the threads it's trying to get to exit.
Merge pull request #3465 from jimfcarroll/fix-some-hang-on-exits

Potential fix for one case of hanging-on-exit
Merge pull request #3418 from Karlson2k/charsetconverter_rework_04

CharsetConverter rework - part 04
cosmetic: move CGUIControlFactory::GetDimension private
adds control positioning via <left>, <top>, <right>, <bottom>, <centerx> and <centery>.  The <posx>, <posy>, <width> and <height> are derived.  Also allows for percentage sizing/positioning, e.g. <left>25%</left>
changed: right aligned label controls behave like list labels (i.e. <posx> is always the left edge)
[confluence] update now that <posx> for labels is interpreted the same as all controls