* Fixes#1632
* Allow underline and strikethrought text decorations on labels and spans
* revert some files
* pr feedback adjustments
* remove docs
* rename interface
* reorder enum
* clean up whitespace
* adjust tizen renderer
* add gallery demo for setting both underline and strike
* allow multiple values of enum to be set in xaml/css
* use normal null check
* use nameof
* include paragraph style
* tab alignment
* rebase from upstream
* pass control to update method on UWP
* correct text decorations type converter
* reset run text instead of label text on UWP when spans are used
* add tests for text decoration converter
Alan Grgic