Fixed issue #1946: In "Compare revisions", please show something to confirm when there are no differences

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

Signed-off-by: Sven Strickroth <email@cs-ware.de>
LogDlg: Flash find window if nothing is found

Signed-off-by: Sven Strickroth <email@cs-ware.de>
LogDlg: Start at the beginning when the end is reached

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fix border of LogDlg search dialog

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

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