Fix the problem that cannot create new task after clearing checksum option Other bug fix and user interface optimization Support overriding aria2 global settings with empty content when create new download task (#712) Other bug fix and user interface optimization Update Traditional Chinese translation (#705, thx @ChiaYen-Kan) Other bug fix and user interface optimization Add check-integrity to task settings tab (#693, thx @raytrap) Fix a spelling mistake (#696, thx @rusq) fix due to the index.html (1.3.6) cite these 2 png files. To keep the page looks fine without 404, added these 2 png files. Signed-off-by: Ariel Xiong <ArielHeleneto@outlook.com>