increased max sensitivity value

Complete rework by Heath Mitchell

The sensitivity scale has been extended (from 0-30 to 0-50) because on some devices the minimum sensitivity was still too much.

A visual feedback for "how much" of the horizontal swipe gesture is needed in order to trigger the history jump is now shown with a grey bar at the bottom of the browser window. The height of the feedback bar can be configured from preferences. It can be set to a height of 0 if you don't want to see it at all. The bar is hidden by default, and is shown only when the swipe gesture is detected.

The sensitivity scale has been extended (from 0-30 to 0-50) because on some devices the minimum sensitivity was still too much.

A visual feedback for "how much" of the horizontal swipe gesture is needed in order to trigger the history jump is now shown with a grey bar at the bottom of the browser window. The height of the feedback bar can be configured from preferences. It can be set to a height of 0 if you don't want to see it at all. The bar is hidden by default, and is shown only when the swipe gesture is detected.

A visual feedback is now provided when the user initiates the swipe gesture. A grey bar sticked to the bottom of the page now shows how much one has to keep swiping to trigger the page load. The height of the feedback bar can be configured from the extension preferences. It can be set to a height of 0 if you don't want to see it at all.

The default sensitivity has been lowered a little bit.