* [CoreText] Fix bug 54148 - CoreText.CTParagraphStyle does not pick up settings from CTParagraphStyleSettings
https://bugzilla.xamarin.com/show_bug.cgi?id=54148
CTParagraphStyle float properties have the incorrect float return type,
the headers state this API's returns CGFloats (aka nfloat) instead of floats
this used to work ok fetching them due to there is no difference in size
for 32 bits devices but once 64 bit devices appeared the API began to fail
The actual method that fetches the values `CTParagraphStyleGetValueForSpecifier`
asks for the size of the returned data and we used to give the size of a float
which is incorrect in 64 bits devices and the API call just correctly returned
false because it could not write back the value to us.
Added tests for the full properties available on CTParagraphStyle
* Add comment about the weird Dispose method implementation in CreateFromSettings
Sebastien Pouliot
Alex Soto