use values from Qt style for toolbar style, toolbar icons size and tabs position by default
Merge pull request #60 from volkov0aa/use-style-values

use values from Qt style for toolbar style, toolbar icons size and tabs ...
fix case conversion for non-ASCII characters

Fixes #42
It's a workaround for scintilla bug.
See details in the comment in source code.
Merge pull request #61 from volkov0aa/fix-case-conv

fix case conversion for non-ASCII characters