git-gui: Add a 'recursive' checkbox in the clone menu.
git-gui: Add a 'recursive' checkbox in the clone menu.

Permit to do a 'git clone --recursive' through git-gui.
Add a 'recursive' checkbox in the clone menu which allows
users to clone a repository and all its submodules in one
go (unless the 'update' flag is set to "none" in the
.gitmodules file for a submodule, in that case that
specific submodule is not cloned automatically).

Enable this new option per default, as most users want to
clone all submodules too when cloning the superproject
(This is currently not possible without leaving git gui
or adding a custom tool entry for that).

Signed-off-by: Henri GEIST <c82b32a34a3c386f5c7b8e812d6bd0afb1c2a2fe@laposte.net>
Thanks-to: Jens Lehmann <3a81d01482cca860e4077eb409d7db78ebdc6f24@web.de>
Signed-off-by: Pat Thoyts <fe43a83262eef1680511f524a1e74d43c633cffe@users.sourceforge.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git