Fixed issue #1769: "Show Log" missing from context menu if "Shell Extended" and a file was Added but not committed

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed issue #1917: Avoid request to stash if there is nothing to rebase or fast forward is possible

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>
Enabled gray/hide paths even if the other is selected

Signed-off-by: Fredrik Svensson <fresve85@gmail.com>
Signed-off-by: Sven Strickroth <email@cs-ware.de>