Make Tile.DisplayIndex property a dependency property so it can be can be set through data binding.

This feature will be available with Q2 2015 expected till the end of June. 

Resolved with Q3 2014 expected till the end of October. 

This issue will be resolved with Q3 2014 expected till the end of the month. 

The fix will be released with Q1 2016 offical version.

If there is only one tile in a group and its Visibility property is set to Collapsed, the group header does not disappear.

Please provide an event for when a Tile gets moved and/or when a Tile gets placed into a group or removed from a group.  Something simple like OnTileMoved with event args pointing to the tile and new values (like updated group) would be peachy. :)

Should be resolved with lib version 2014.3.1124

The problem should be resolved with lib version 2015.3.1026.

The fix will be available with Q2 2015.