Refactored editor startup into own package

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
Editor startup refactoring

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>
https://github.com/jcryptool/core/issues/88

Editor pulldown is visible again and filled with text editor.

Signed-off-by: Dominik Schadow <dominikschadow@googlemail.com>