Improve demo app screenshots (MaterialDesignInXAML#1585)

* Remove Windows10 titlebar from demo app screenshots

* Add Chips screenshot to README.md file

Renaming file to match class name

Icons update from Azure pipeline (MaterialDesignInXAML#1318)

Merge branch 'master' into release

Updating icons. (MaterialDesignInXAML#1076)

Adding support for icon aliases
Updated resource generator to handle different versions of TLS
Updated demo app to only show distinct enum values.

Merge pull request MaterialDesignInXAML#994 from MaterialDesignInXAML…

…/master

Proposed 2.4.1 Release

update trees demo, fixes MaterialDesignInXAML#896

Merge branch 'master' of https://github.com/jizc/MaterialDesignInXaml…

…Toolkit into jizc-master

Merge pull request MaterialDesignInXAML#649 from Keboo/clippedIcons

Icons on TextBox context menu appear clipped.

release prep [skip ci]