Add Enable EditorConfig in settings page

Based on TortoiseSVN revision 25636

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
If reflected name is specified, use it for editorconfig

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Pass reflected names to TortoiseGitMerge

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