[Mac] fix error when scrolling mouse wheel on popup
clean up codes
fix: mouse gesture fires incorrectly in Tilt 3D View
add 'Web Developer - Toggle Tools' command
improve 'Go Upper Level' command for about: URL
improve 'Go Upper Level' command for root URL
stop using deprecated 'for each...in' statement
reorder naturally when opening multiple tabs at once
[TreeStyleTab] fix regression: 'Open Link in New Tab' does not open as child
fix: 'Save Link As' command ignores Content-Disposition
'Save Image As' commad supports saving HTML5 video and audio
'Save Image As' command supports saving CSS background image
locale updates
ver.1.7.1