Update Scintilla to version 3.4.4

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Adjusted and applied backgroundcolors.patch

Based on TortoiseSVN revision 25655

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Applied unicodefont.patch

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Merge branch 'scintilla'