X-axis labels get truncated

[sanjaypojo]

This doesn't happen when you provide an axis title though.

[alisaono]

In replot-core, the offset (height reserved for x labels) are currently set constant. It just adds 25px to the bottom offset if x labels are visible, and adds additional 45px if x title is visible.

We can either increase the offset for a temporary fix, or be smarter about calculating the actual offset needed? @sanjaypojo

[sanjaypojo]

@alisaono Would be really cool if we can be smart about how we compute offsets. Either way, we need to increase the default offset a bit - let's do that for now, but keep this issue open (as an enhancement, not a bug).