Drop double check for start < 0

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Use call by reference instead of a pointer

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Deduplicate code and sync IconBitmapUtils with TortoiseSVN

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Add full support for ShowAppContextMenuIcons

Signed-off-by: Sven Strickroth <email@cs-ware.de>
No need to include full ShellExt.h

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Deduplicate code

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Commit Dialog: Add "Pick commit message" in message text box context menu

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