Rename CChooseVersion::Init() as CChooseVersion::InitChooseVersion()

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Fixed "menurebase.ico" in order to display properly on the Context Menu list of the Settings dialog.
Updated "Push.ico" to look more similar to Pull and Commit icons.

Signed-off-by: Ricardo Alexandre Vieira <vierinha@gmail.com>