Change wording "&Version" to "&Commit" in Create Branch/Tag and Merge dialogs and adjust "No &Commit" to "No Co&mmit"

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Use singular form of "Tag" where combo boxes allow single selection only

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Fixed issue #1783: TortoiseGit does not work on WinXP/2003 x64

Extended the patch of revision 13994a8e02965ac231947e6619128c6abb6dcfe9.

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