Use native scrollbar for horizontal scrolling

[kobruleht]

Horizontal scrolling can be done only using custom slider or buttons. It has the following issues:

1. If brower window width is too small, eq. in mobile phones, right part is clipped and is not accessible.
2. This is unnatural and ugly. Screen looks overpopulated by number of difficult to understand buttons and slider.
3. Buttons are too small for mobile users. Button sizes do not correcpond to google web site devepoment guidelines and google does not mark this gantt as mobile fiendly.

Proposed solution:

Instead on this, horizontal scrolling should be implemented using browser native horizontal scroll toolbar like in former grid in

http://thegrubbsian.github.io/jquery.ganttView/example/index.html