Moved setting strings into constants.
Re-enabled drag and drop for the application toolbar.
The ok button in the new/edit application button dialog is now disabled when either the name or command field is blank.
- Removed TODO comment.
- Renamed constant.
- Removed unused variable.
- Shifted default columns to separate header file.
- Moved "Open In Explorer++" string to string table.
- Moved several constants to specific files (rather than general header file).
- Moved image index declarations to separate header file.
- Moved several method definitions to specific header file (rather than general header).
Reorganized Explorer++ project files within Visual Studio.
Refactored shared application button creation code.