[Feature Request] Allow horizontal scroll in graph

[redsigma]

Sometimes you have to go in the commit history a few years back because management wants to resurrect an old feature. And it seems that when the history is very messy, the text gets cut out

I think it would be nice if a horizontal scroll bar always shows up, only if all the other columns (AUTHOR, SHA, DATETIME) are hidden.

An alternate feature could be to trim/fold some of the left-side commits, to make more space for the ones on the right