* src/frontends/qt[34]/qt_helpers.[Ch]
(toqstr): add variant for docstring
(qstring_to_ucs4): Use docstring and port from qt4 to qt3
* Many other files: Many std::string -> lyx::docstring conversions
* src/support/lstrings.[Ch]
(subst): Add variant for docstring and char_type
(externalLineEnding): std::string -> lyx::docstring
(internalLineEnding): std::string -> lyx::docstring
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14871 a592a061-630c-0410-9148-cb99ea01b6c8
* qfont_metrics.C: make use of above methods instead of those in unicode.[Ch]
* QLPainter.C: ditto
* QLyXKeySym.C: ditto + simplification and a BOOST_ASSERT that verifies that the event is one char only.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14852 a592a061-630c-0410-9148-cb99ea01b6c8