Strip and plot title text size

[tdhock]

this is a follow-up to #66 and #78
I implemented custom text sizes that can be specified in R code, for plot and panel/strip titles.
Since this is very similar to your GSOC project last year @Faye-yufan can you please review?

[tdhock]

also do you have any idea why the test is failing? It seems that we should be able to get the text size via text-size style, just like the axis ticks etc.

[Faye-yufan]

Hi @tdhock , thanks for the follow-up!
For the test, it's probably because the font-size for the title is defined as a property instead of a style, and the test helper function getStyleValue() is for getting style only.
I assume we don't have any helper function to get the value of properties, so I created a new function called getPropertyValue(). It shall pass now.

[Faye-yufan]

It looks good to me!

[Faye-yufan]

So we will remove the rel size in animint2 aesthetic?

[tdhock]

Thanks for your review @Faye-yufan and for the fix in the tests.
I'm not sure I understand the question. I think rel is ok to use still, but this deletion of strip.text property was intended to increase the text size of the strip text, does that make sense?

[Faye-yufan]

Yeah sure! I get it now.