release prep [skip ci]

push selection change events behind text events, so hit proxy can que…

…ry current state better, fixing issue with hint colouring. MaterialDesignInXAML#532

prep release number

update icon pack

make hyperlinks for scheme

Merge branch 'master' into release

remove empty trigger

fix floating hint issue on returning to a screen fixes MaterialDesign…

…InXAML#193

update build number

demo tidy up