* --boost option is added to gettext_make_pot script to recognize Boost format strings.
* New script gettext_merge_po_with_pot is added to merging new lines from POT to current PO
* --check-format option is added to gettext_po_to_mo script to check language dependent format strings during generation MO from PO.
* POT is updated and all PO files are merged with it. So, community can just load needed PO file and continue in translation.
* ExtruderSequenceDialog: Added messed localization markers
Fixed crash due to incorrect localization of the percent sign in
"The %1% infill pattern is not supposed to work at 100%% density."
This happens for ES, FR, IT, UK and ZH_TW localizations.
Also added a new CMake target "gettext_po_to_mo" to convert
all po files to mo files,
and renamed the "pot" target to "gettext_make_pot".
* Signs of degree are returned to UTF-8 in PrintConfig.
* Changed _LU8 macro. It's translated now like string explicitly specified as a string is already in UTF-8 encoding.
* m_Local and its functions moved to GUI.cpp.
* Strings in some files(GUI.cpp, Tab.cpp, Tab.hpp & Field.cpp) marked by _L() macro.
* Updated mo-files for En and Uk languages.
