Git Property Page: get latest change in new thread

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Estimate the required stack size for getting latest change using libgit2

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Make string translatable

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed possible crash in libgit2 by adding a mutex

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Merge branch 'prop-page-crash'

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

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Dropped some unused strings

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

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>