Adjust font sizes and label width when based on view bounds

[diegorozen]

The font sizes and label sizes assume a large enough width for DayView. With a smaller view, labels start to overlap. Should additional params like DaySelectorStyle.dateLabelWidth and SwipeLabelStyle.labelFont be added to styles. The alternative would be to automatically size the element proportionally.

[richardtop]

@diegorozen could you attach the screenshot? Both solutions are OK, there could be value like DateLabelWidthAuto to force automatic width.

[diegorozen]

Adding an exaggerated small one to make the issue evident:

[jameswwwebster]

@diegorozen, I submitted a pull request a little while ago to support dynamic font sizes; this may, at least partially, help with this problem.